
AMS Sectional Meeting Full Program
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1999 Spring Southeastern Section Meeting
Gainesville, FL, March 1213, 1999
Meeting #940
Associate secretaries: Robert J Daverman, AMS daverman@math.utk.edu
Friday March 12, 1999

Friday March 12, 1999, 7:30 a.m.4:00 p.m.
Meeting Registration
Third Floor Atrium, W. W. Little Hall

Friday March 12, 1999, 7:30 a.m.4:00 p.m.
Book Sale and Exhibit
Room 353, W. W. Little Hall

Friday March 12, 1999, 8:00 a.m.10:40 a.m.
Special Session on Ergodic Theory and Dynamical Systems, I
Room 223, W. W. Little Hall Organizers: Jonathan L.F. King, University of Florida squash@math.ufl.edu

8:00 a.m.
Maximal Chaos on manifolds.
Vidhu S Prasad*, UMass Lowell
Steve R Alpern, LSE
(9402863)

9:00 a.m.
Chaotic measurepreserving homeomorphisms are generic.
Fons G.M. Daalderop*, Delft University of Technology
Robbert Fokkink, Delft University of Technology
(94054267)

9:30 a.m.
Kazhdan's property T and the geometry of the collection of invariant measures.
Eli Glasner*, Tel Aviv University
Benjamin Weiss, Hebrew University
(94028381)

10:00 a.m.
Minimal and ergodic cocycles arising from linear differential systems.
Mahesh G. Nerurkar*, Rutgers University
(9402854)

Friday March 12, 1999, 8:10 a.m.10:50 a.m.
Special Session on Probability on Algebraic Structures, I
Room 235, W. W. Little Hall Organizers: Gregory M. Budzban, Southern Illinois University at Carbondale gregb@math.siu.edu
Philip Feinsilver, Southern Illinois University at Carbondale pfeinsil@math.siu.edu
Arunava Mukherjea, University of South Florida arun@math.usf.edu

8:10 a.m.
Hecke pairs, locally compact hypergroups and probability theory.
Herbert Heyer*, Mathematisches Institut, Universitaet Tuebingen, GERMANY
(9406012)

8:50 a.m.
Break

9:30 a.m.
Martingale characterizations of L\'evy processes on locally compact groups.
Michael P Voit*, Universitaet Tuebingen
(9406018)

10:00 a.m.
Markov kernels related with Dunkl operators.
Margit M Roesler*, TU Muenchen, Germany
Michael P Voit, Universitaet Tuebingen, Germany
(9406021)

10:30 a.m.
Brownian motion and the classical groups.
Anthony J. D'Aristotile*, SUNY at Plattsburgh
Persi Diaconis, Stanford University
Charles Newman, Courant Institute of Mathematical Sciences
(9406010)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on The Erd\H os Legacy and Connections to Florida, I
Room 101, W. W. Little Hall Organizers: Krishnaswami Alladi, University of Florida alladi@math.ufl.edu
Jean Larson, University of Florida jal@math.ufl.edu

8:30 a.m.
Erdos at the University of Florida.
Jean A. Larson*, University of Florida
(94001376)

9:00 a.m.
Counting lattice points by means of the residue theorem.
Matthias Beck*, Temple University
(9400524)

9:30 a.m.
A simple proof of Riemann's function equation for zeta(s).
Sinai Robins*, Temple University
(94005309)

10:00 a.m.
Erdos's elementary method for the asymptotics of partitions.
Melvyn B. Nathanson*, Lehman College (CUNY)
(94011374)

10:30 a.m.
Stable sets.
A J Hildebrand*, University of Illinois
(94011253)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Finite Groups and Their Representations, I
Room 109, W. W. Little Hall Organizers: Alexandre Turull, University of Florida turull@math.ufl.edu

8:30 a.m.
Some Integral Representations of Complex Reflection Groups.
Walter Feit*, Yale University
(94020331)

9:00 a.m.
The Schur indices of the special linear groups.
Alexandre Turull*, University of Florida
(94020144)

9:30 a.m.
Schur indices of projective representations of hyperoctahedral groups.
Zhaowei Z.D Du*, Microsoft
(94016357)

10:00 a.m.
Using character correspondences for Schur index computations.
Allen Herman*, University of Regina
(9402058)

10:30 a.m.
Tensor products involving the spin representation of the symmetric group .
Rod I Gow*, University College, Dublin.
(94020114)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Galois Theory, I
Room 205, W. W. Little Hall Organizers: J. G. Thompson, University of Florida thompson@math.ufl.edu
H. Voelklein, University of Florida helmut@math.ufl.edu

8:30 a.m.
Higher dimensional algebraic fundamental groups.
Shreeram S. Abhyankar*, Purdue University
(9401428)

9:00 a.m.
Galois groups of composite qadditive polynomials.
Ganapathy S. Sundaram*, Bell Labs
(94012343)

9:30 a.m.
Galois Extensions via Drinfeldmodule based Iterations.
Paul A. Loomis*, Purdue University
(94012336)

10:00 a.m.
Linearized polynomials with classical Galois groups.
Michael E Zieve*, USC
(94014346)

10:30 a.m.
Black box exceptional groups of Lie type .
William M Kantor, University of Oregon
Kay Magaard*, Wayne State University
(94020205)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Geometric Topology, I
Room 121, W. W. Little Hall Organizers: James E. Keesling, University of Florida jek@math.ufl.edu
Alexander N. Dranishnikov, University of Florida dranish@math.ufl.edu

8:30 a.m.
Embeddings in generalized manifolds.
John L Bryant*, Florida State University
Washington Mio, Florida State University
(94057319)

9:00 a.m.
Some algebraic applications of topological rigidity.
Boris Goldfarb*, SUNY at Albany
(94057358)

9:30 a.m.
The geometric topology of homology manifolds.
Heather M Johnston*, Rutgers University
(94057136)

10:00 a.m.
Stable Zcompactifications of polyhedra.
Steven C Ferry*, Rutgers U
(94057172)

10:30 a.m.
Controlled maps on homology manifolds.
Washington Mio*, Florida State University
John L Bryant, Florida State University
(94057329)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Linear Operator Theory, I
Room 113, W. W. Little Hall Organizers: Leiba Rodman, College of William \& Mary lxrodm@math.wm.edu
Scott A. McCullough, University of Florida sam@math.ufl.edu

8:30 a.m.
Positive Commutators of Multipliers and Fourier Multipliers.
Ira W. Herbst, University of Virginia
Thomas L. Kriete, III*, University of Virginia
(94047341)

9:00 a.m.
Lexicographic lifting and interpolation problems.
Marisela Dom\'{\i}nguez*, Universidad Central de Venezuela
(9404749)

9:30 a.m.
Model Theory for Hyponormal Contractions.
Michael A. Dritschel*, University of Cincinnati
Scott McCullough, The University of Florida
(94047305)

10:00 a.m.
Higher Order Hankel Forms, Factorization and Derivations.
William Cohn, Wayne State University
Sarah Ferguson*, Wayne State University
Richard Rochberg, Washington University
(94047334)

10:30 a.m.
Existence of a rich collection of positively quadratically hyponormal weighted shifts.
Ra\'ul E. Curto*, The University of Iowa
(94047178)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Partial Differential Equations and Applications, I
Room 219, W. W. Little Hall Organizers: Gang Bao, University of Florida bao@math.ufl.edu
Yunmei Chen, University of Florida yun@math.ufl.edu

8:30 a.m.
Singularities of energyminimizing maps.
Robert M Hardt*, Rice University
(94035147)

9:00 a.m.
Weak compactness of harmonic maps and wave maps.
Alex Freire*, University of Tennessee
(94035266)

9:30 a.m.
ChernGaussBonet integrals on complete 4manifolds.
Alice SY. Chang, Princeton University and UCLA
Jie Qing*, UCSC
Paul Yang, USC
(94053356)

10:00 a.m.
The analysis of positive solutions of nonlinear partial differential equations and the topology of manifolds.
Shihshu Walter Wei*, The University of Oklahoma
(94053332)

10:30 a.m.
Partial Regularity for Heat Flows of $H$Surfaces.
Changyou Wang*, loyola university of chicago
(94035273)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Analytical Problems in Mathematical Physics, I
Room 127, W. W. Little Hall Organizers: Eric A. Carlen, Georgia Institute of Technology carlen@math.gatech.edu
Laszlo Erdos, Courant Institute, NYU erdos@cims.nyu.edu

8:30 a.m.
A Heisenberg Uncertainty Principle for White Noise Analysis.
Aurel I Stan*, Louisiana State University
(94060361)

9:00 a.m.
Regularity and dimension bounds for random curves.
Almut Burchard*, University of Virginia
(94082236)

9:30 a.m.
Lifshitz tails for random Schrödinger operators with negative singular Poisson potential.
Frederic Klopp*, Universite Paris Nord
Leonid A Pastur, Universite Paris 7
(9408265)

10:00 a.m.
On the Density of States of the Schr\"{o}dinger Operator with a Periodic Potential.
Yulia Karpeshina*, UAB
(94035293)

10:30 a.m.
NonMonotonicity in Random Schr\"odinger Operators.
G\"unter Stolz*, University of Alabama at Birmingham
(94081203)

Friday March 12, 1999, 8:30 a.m.10:50 a.m.
Special Session on Algebraic and Geometric Combinatorics, I
Room 207, W. W. Little Hall Organizers: Andrew J. Vince, University of Florida vince@math.ufl.edu
Neil L. White, University of Florida white@math.ufl.edu

8:30 a.m.
Counting Points on Varieties over Finite Fields Related to a Conjecture of Kontsevich.
John R Stembridge*, University of Michigan
(9400587)

9:00 a.m.
Short rational functions .
Alexander Barvinok*, University of Michigan
(94005241)

9:30 a.m.
A Homotopy Equivalence for Set Partitions related to Liftings of $S_{n1}$modules to $S_n$.
Sheila Sundaram*, Danbury, CT
(9400584)

10:00 a.m.
The Hilbert Series of A Ladder Determinantal Ideal.
Ian P. Goulden, University of Waterloo,Waterloo,Ontario
Devadatta M. Kulkarni*, Oakland University, Rochester, Michigan
(94005276)

10:30 a.m.
Matroid automorphisms and symmetry groups.
Lori Fern, SUNY at Binghamton
Gary P Gordon*, Lafayette College
Jason Leasure, University of Texas
Sharon Pronchik, lmco
(9400559)

Friday March 12, 1999, 8:45 a.m.10:50 a.m.
Special Session on Geometry of Interacting Particles, Random Walks, and Brownian Motion, I
Room 233, W. W. Little Hall Organizers: Irene Hueter, University of Florida hueter@math.ufl.edu
Gregory F. Lawler, Duke University jose@math.duke.edu

8:45 a.m.
Hydrodynamic limit for the asymmetric marching soldiers model.
Timo Sepp\"al\"ainen*, Iowa State University
(9406060)

9:30 a.m.
Estimating selection from aligned DNA sequences.
Stanley A. Sawyer*, Washington University in St.~Louis
(94060107)

10:15 a.m.
Growth Profile of Weakly Supercritical Contact Process on a Tree.
Steven P Lalley*, Purdue University
(94060333)

Friday March 12, 1999, 9:00 a.m.10:50 a.m.
Special Session on Continuum Theory and Dynamical Systems, I
Room 125, W. W. Little Hall Organizers: Philip Boyland, University of Florida boyland@math.ufl.edu
Beverly Brechner, University of Florida brechner@math.ufl.edu
John Mayer, University of Alabama at Birmingham mayer@math.uab.edu

9:00 a.m.
The Contraction Principle for certain locally connected Julia sets.
Lex G. Oversteegen*, UAB
Alexander Blokh, UAB
(94054303)

9:30 a.m.
Dynamics of entire semigroups.
Hartje Kriete*, University of Goettingen
Hiroki Sumi, Kyoto University
(94030363)

10:00 a.m.
Decomposable models of boundaries of Siegel disks.
Andrew O Maner*, University of Alabama at Birmingham
John C Mayer, University of Alabama at Birmingham
Lex G Oversteegen, University of Alabama at Birmingham
(94054110)

10:30 a.m.
Attractors for graphcritical rational functions.
Alexander Blokh*, University of Alabama at Birmingham
Michal Misiurewicz, Indiana University  Purdue University at Indianapolis
(94058304)

Friday March 12, 1999, 9:00 a.m.10:50 a.m.
Special Session on Markov Processes and Potential Theory, I
Room 239, W. W. Little Hall Organizers: Joe Glover, University of Florida glover@math.ufl.edu
Murali Rao, University of Florida rao@math.ufl.edu

9:00 a.m.
Brownian potentials and Besov spaces over domains.
Hrvoje \v{S}iki\'{c}*, Washington University, St.Louis, and University of Zagreb, Croatia
Mitchell H. Taibleson, Washington University, St.Louis
(94060104)

9:30 a.m.
Measure perturbations of Markovian semigroups.
R. K. Getoor*, University of California, San Diego
(94060130)

10:00 a.m.
Hardy's Inequality for Dirichlet Forms.
Patrick J Fitzsimmons*, University of California, San Diego
(94060351)

10:30 a.m.
Martingales on the excursion space.
Jacques Azema*, Univesity Paris 5
(94000192)

Friday March 12, 1999, 9:00 a.m.10:50 a.m.
Special Session on Groups and Geometries, I
Room 201, W. W. Little Hall Organizers: Chat Ho, University of Florida cyh@math.ufl.edu
Peter Sin, University of Florida sin@math.ufl.edu

9:00 a.m.
Pieces of Eight.
Robert L. Griess, Jr.*, University of Michigan
(94020367)

9:30 a.m.
Dade's conjecture for the finite unitary groups.
Chao Ku*, California Institute of Technology
(94020377)

10:00 a.m.
Is $71:35$ a maximal subgroup of the Monster?
Hiroyoshi Yamaki*, Kumamoto University
(94020212)

10:30 a.m.
On the first cohomology group of a finite group.
Corneliu G Hoffman*, University of California Irvine
(94020164)

Friday March 12, 1999, 9:00 a.m.10:50 a.m.
Special Session on Computability Theory, I
Room 217, W. W. Little Hall Organizers: Douglas Cenzer, University of Florida cenzer@math.ufl.edu
Geoffrey Louis LaForte, University of West Florida glaforte@coginst.uwf.edu
Rick L. Smith, University of Florida rs@math.ufl.edu

9:00 a.m.
Nonlow$_{2}$ r.e. degrees with the properties of low$_{2}$ degrees.
Richard A. Shore*, Cornell University
(94003179)

10:00 a.m.
A set with minimal wttdegree and c.e. Turing degree .
Reed Solomon*, University of Wisconsin, Madison
Rod Downey, Victoria University
(94003246)

10:30 a.m.
Every set has a least jump enumeration.
Richard J Coles*, University of Auckland
Rod G Downey, Victoria University of Wellington
Theodore A Slaman, University of California, Berkeley
(94003189)

Friday March 12, 1999, 9:00 a.m.10:50 a.m.
Special Session on Structure and Representation Theory of LatticeOrdered Groups and fRings, I
Room 203, W. W. Little Hall Organizers: Jorge Martinez, University of Florida martinez@math.ufl.edu

9:00 a.m.
Coepic compactifications.
Anthony W Hager*, Wesleyan University
Jorge Martinez, University of Florida
(94006265)

9:30 a.m.
Embedding the algebra of all realvalued functions on a space X in a regular ring G(X) II; when G(X) is a C(Y).
Melvin Henriksen*, Harvey Mudd College
(94006113)

10:00 a.m.
Model theory of real closed rings.
Alex Prestel, Universitaet Konstanz
Niels C. Schwartz*, Universit\"at Passau
(94006160)

10:30 a.m.
fRings and the Stone Weierstrass Theorem.
Bernhard Banaschewski*, McMaster University
(9400697)

Friday March 12, 1999, 11:00 a.m.12:00 p.m.
Invited Address
Welcome: Krishnaswami Alladi, Chair, Department of Mathematics, University of Florida
Main Lecture Hall, Carleton Auditorium
Opening Remarks: Willard Harrison, Dean  College of Liberal Arts, University of Florida
Main Lecture Hall, Carleton Auditorium
Double cosets in the upper triangular group.
Main Lecture Hall, Carleton Auditorium
John G. Thompson*, University of Florida

Friday March 12, 1999, 1:25 p.m.2:15 p.m.
Invited Address
Photons and stability of matter: how heavy is an electron.
Main Lecture Hall, Carleton Auditorium
Elliott H. Lieb, Princeton University
Michael P. Loss*, Georgia Tech
(94081112)

Friday March 12, 1999, 2:30 p.m.5:50 p.m.
Special Session on Continuum Theory and Dynamical Systems, II
Room 125, W. W. Little Hall Organizers: Philip Boyland, University of Florida boyland@math.ufl.edu
Beverly Brechner, University of Florida brechner@math.ufl.edu
John Mayer, University of Alabama at Birmingham mayer@math.uab.edu

2:30 p.m.
A characterization of $k$dimensional Nobeling space for every $k > 1$.
S. Ageev*, Brest State University
(94054379)

3:00 p.m.
Some properties and problems concerning continua arising in dynamical systems.
R. Daniel Mauldin*, University of North Texas
(94058225)

3:30 p.m.
Dynamics of FixedPointFree Maps on TreeLike Continua.
Piotr Minc*, Auburn University
(94054166)

4:00 p.m.
Dynamics and inverse limit spaces.
Louis Block*, University of Florida
(9405450)

4:30 p.m.
Retracts and indecomposability.
Wayne Lewis*, Texas Tech University
(94054275)

5:00 p.m.
Oneparameter adjustments of selfinsertion.
Krystyna M. Kuperberg*, Auburn University
(9405888)

5:30 p.m.
Using the Code Space with SelfSimilar Fractals.
James E Keesling*, University of Florida
(94028352)

Friday March 12, 1999, 2:30 p.m.4:50 p.m.
Special Session on The Erd\H os Legacy and Connections to Florida, II
Room 101, W. W. Little Hall Organizers: Krishnaswami Alladi, University of Florida alladi@math.ufl.edu
Jean Larson, University of Florida jal@math.ufl.edu

2:30 p.m.
Induced Subgraphs With Given Numbers of Edges.
Paul Erd\H{o}s,
Zolt\'{a}n F\"{u}redi, University of Illinois at UrbanaChampaign
Bruce Rothschild*, University of California, Los Angeles
Vera S\'{o}s, Mathematical Institute, Hungarian Academy of Sciences
(94005206)

3:00 p.m.
Database Security and Concentrating Sums of Vectors.
Jerrold R. Griggs*, University of South Carolina
(94005297)

3:30 p.m.
Countable Partition Ordinals.
Rene J Schipperus*, University of Colorado at Boulder
(94004256)

4:00 p.m.
What About Polarized Partition Relations?
Albin L. Jones*, Dartmouth College
(94004327)

4:30 p.m.
Partition relations for Successor Cardinals.
Matthew D Foreman*, UC Irvine
(94005306)

Friday March 12, 1999, 2:30 p.m.5:20 p.m.
Special Session on Markov Processes and Potential Theory, II
Room 239, W. W. Little Hall Organizers: Joe Glover, University of Florida glover@math.ufl.edu
Murali Rao, University of Florida rao@math.ufl.edu

2:30 p.m.
Multiply Superharmonic functions and Jensen Measures.
Kohur Gowrisankaran*, McGill Univ.
(94031208)

3:00 p.m.
Sobolev spaces, stability, and capacities.
Lars I Hedberg*, Link\"oping University
(94031221)

3:30 p.m.
Thin sets and boundary behavior of solutions of the Helmholtz equation.
Kohur GowriSankaran, McGill University
David H Singman*, George Mason University
(9403161)

4:00 p.m.
Choquet integrals in Potential Theory: An $L^p$Evans law.
David R. Adams*, University of Kentucky
(9403114)

4:30 p.m.
Jensen Measures and Harmonic Measures.
Brian J Cole, Brown University
Thomas J Ransford*, Laval University
(9403142)

5:00 p.m.
Nonlinear potentials and generalized Sobolev inequalities.
Igor E. Verbitsky*, University of Missouri
(9403133)

Friday March 12, 1999, 2:30 p.m.4:50 p.m.
Special Session on Finite Groups and Their Representations, II
Room 109, W. W. Little Hall Organizers: Alexandre Turull, University of Florida turull@math.ufl.edu

2:30 p.m.
Elementary abelian subgroups of finite pgroups of prime exponent .
George I Glauberman*, University of Chicago
(94020173)

3:00 p.m.
On some Lie algebras associated to propgroups.
Norberto Gavioli, University of L'Aquila
Valerio Monti, University of Rome "La Sapienza"
Carlo M Scoppola*, University of L'Aquila
(94020238)

3:30 p.m.
On the Density of Generating Pairs in some Finite Classical Simple Groups.
Aron Bereczky*, Mathematical Institute, Hungarian Academy of Sciences
(94020260)

4:00 p.m.
A generalization of the BrauerSuzuki theorem.
Radha Kessar*, University of Minnesota
Markus Linckelmann, CNRS
(94020347)

4:30 p.m.
Subgroup chains in finite groups.
Ronald M. Solomon*, The Ohio State University
(94020148)

Friday March 12, 1999, 2:30 p.m.5:20 p.m.
Special Session on Galois Theory, II
Room 205, W. W. Little Hall Organizers: J. G. Thompson, University of Florida thompson@math.ufl.edu
H. Voelklein, University of Florida helmut@math.ufl.edu

2:30 p.m.
Arithmetic lifting over large fields.
David Harbater*, University of Pennsylvania
(94014186)

3:00 p.m.
Ordinariness and Covers.
Katherine F. Stevenson*, California Institute of Technology
(94014254)

3:30 p.m.
Reduction of covers of curves.
Irene I Bouw*, University of Pennsylvania
(94014228)

4:00 p.m.
Formal geometry, rigid geometry and regular covers.
Tamara R. Lefcourt*, University of Texas
(9401481)

4:30 p.m.
Good reduction of wildly ramified covers.
Claus G Lehr*, University of Pennsylvania, Philadelphia, PA
(94014201)

5:00 p.m.
Patching and Deformation of Wildly Ramified Covers.
Rachel J. Pries*, University of Pennsylvania
(94014204)

Friday March 12, 1999, 2:30 p.m.5:50 p.m.
Special Session on Computability Theory, II
Room 217, W. W. Little Hall Organizers: Douglas Cenzer, University of Florida cenzer@math.ufl.edu
Geoffrey Louis LaForte, University of West Florida glaforte@coginst.uwf.edu
Rick L. Smith, University of Florida rs@math.ufl.edu

2:30 p.m.
Automorphisms of the Lattice of $\Pi_1^0$ Classes.
Rod Downey*, Victoria University of Wellington
(94003176)

3:00 p.m.
Automorphisms of the computably enumerable sets.
Kevin Wald*, University of Chicago
(94003312)

3:30 p.m.
Relativizations of certain concepts in computability theory.
Stephen M Walk*, University of Notre Dame
(94003335)

4:00 p.m.
The Complexity of Extensions of a Nonmonotonic Theory.
Amy K. C. S. Vanderbilt*, University of Florida
(94003274)

4:30 p.m.
Some recent results on the lattice of Pi01 classes.
Farzan Riazati*, University of FLorida
(94003342)

5:00 p.m.
Computability Theory of Generalized Functions.
Klaus Weihrauch, Fern University
Ning Zhong*, University of Cincinnati
(94003139)

5:30 p.m.
Some open problems in computable analysis.
Marian B. PourEl*, University of Minnesota
(94003263)

Friday March 12, 1999, 2:30 p.m.5:20 p.m.
Special Session on Geometric Topology, II
Room 121, W. W. Little Hall Organizers: James E. Keesling, University of Florida jek@math.ufl.edu
Alexander N. Dranishnikov, University of Florida dranish@math.ufl.edu

2:30 p.m.
Group actions on CAT(0) spaces.
Geoghegan Ross*, State University of New York at Binghamton
(9405775)

3:00 p.m.
A NonZCompactifiable Polyhedron whose Product with the Hilbert Cube is ZCompactifiable.
Craig R Guilbault*, University of WisconsinMilwaukee
(94057237)

3:30 p.m.
Dynamics of the action of a CAT(0) Group on the Boundary.
Kim E Ruane*, Vanderbilt University
(94020373)

4:00 p.m.
Piecewise linear and topological embeddings of 2spheres in 4manifolds.
Gerard A Venema*, National Science Foundation
(94057321)

4:30 p.m.
Blowup and Invariants of Fixed Points.
Christopher W. Stark*, University of Florida and NSF
(94057350)

5:00 p.m.
Foliations with good geometry.
Sergio R. Fenley*, Washington University and Princeton University
(94057380)

Friday March 12, 1999, 2:30 p.m.5:50 p.m.
Special Session on Linear Operator Theory, II
Room 113, W. W. Little Hall Organizers: Leiba Rodman, College of William \& Mary lxrodm@math.wm.edu
Scott A. McCullough, University of Florida sam@math.ufl.edu

2:30 p.m.
Left versus right WienerHopf factorization.
Albrecht B\"ottcher, TU Chemnitz
Sergei Grudskii, RostovonDon University
Ilya M Spitkovsky*, The College of William and Mary
(94047207)

3:00 p.m.
Local Normal Forms of Certain Linear Singular Operators.
Alexander Tovbis*, University of Central Florida
(94047137)

3:30 p.m.
Factorization of Transfer Functions of PritchardSalamon systems.
Cornelis V Van der Mee*, University of Cagliari
Marinus A. Kaashoek, Free University Amsterdam
Andre' C. Ran, Free University Amsterdam
(9409398)

4:00 p.m.
The Spectral Shift Operator.
Fritz Gesztesy, University of MissouriColumbia
Konstantin A Makarov*, University of MissouriColumbia
(94047219)

4:30 p.m.
Perturbation of the Heisenburg commutation relation and unbounded subnormal operators.
Daoxing Xia*, Vanderbilt University
(9404735)

5:00 p.m.
Stochastic linearization of nonlinear point dissipative systems.
James A. Reneke*, Clemson University
(9404708)

5:30 p.m.
Evolution semigroups and applications to control theory.
Yuri Latushkin*, University of Missouri
(94047170)

Friday March 12, 1999, 2:30 p.m.5:20 p.m.
Special Session on Partial Differential Equations and Applications, II
Room 219, W. W. Little Hall Organizers: Gang Bao, University of Florida bao@math.ufl.edu
Yunmei Chen, University of Florida yun@math.ufl.edu

2:30 p.m.
Indefinite Elliptic Problems in a Domain.
Wenxiong Chen*, Southwest Missouri State University
Congming Li, University of Colorado
(94035165)

3:00 p.m.
Quasilinear elliptic systems with perturbation of critical growth.
Ruediger Landes*, University of Oklahoma
(94035366)

4:00 p.m.
Solutions to the Initial Boundary Value problem for a Hydrodynamic Model of Semiconductors.
Sixin Qian*, Math. Department, West Virginia University, morgantown, WV, 26506
(94035106)

4:30 p.m.
Asymptotic behavior of semilinear parabolic differential equations and applications to stochastic processes.
Ty Lee*, U of Maryland
(9403505)

5:00 p.m.
Settheoretic methods for partial differential equations.
Efim Galperin*, Universit\'e du Qu\'ebec \`a Montr\'eal
(94035264)

Friday March 12, 1999, 2:30 p.m.4:50 p.m.
Special Session on Structure and Representation Theory of LatticeOrdered Groups and fRings, II
Room 203, W. W. Little Hall Organizers: Jorge Martinez, University of Florida martinez@math.ufl.edu

2:30 p.m.
Archimedean Extensions of Groups of Continuous Functions.
Warren William McGovern*, Bowling Green State University
(94006202)

3:00 p.m.
Some ordered groups that are hard to divisibilize.
W. Charles Holland*, Bowling Green State U.
(94006301)

3:30 p.m.
A characterization of latticeordered matrix algebras with the usual lattice order.
Jingjing Ma*, The University of Toledo
(94006149)

4:00 p.m.
On the scarcity of latticeordered matrix algebras II.
Stuart A Steinberg*, University of Toledo
(9400680)

4:30 p.m.
Wreath products with tyings.
Richard N. Ball, University of Denver, Denver CO
Stephen H. McCleary*, University of Denver, Denver CO (on leave for the academic year from Bowling Green State Univ, Bowling Green OH)
(94006255)

Friday March 12, 1999, 2:30 p.m.5:50 p.m.
Special Session on Analytical Problems in Mathematical Physics, II
Room 127, W. W. Little Hall Organizers: Eric A. Carlen, Georgia Institute of Technology carlen@math.gatech.edu
Laszlo Erdos, Courant Institute, NYU erdos@cims.nyu.edu

3:00 p.m.
Stability of matter in ultravioletcutoff quantized fields.
Gian Michele Graf*, ETH Zurich
(94082226)

3:30 p.m.
Spectral Analysis of Atoms and Molecules interacting with the Electromagnetic Field.
Volker Bach*, TU Berlin
Juerg M Froehlich, ETH Zuerich
Israel Michael Sigal, Univ. of Toronto
(9408139)

4:00 p.m.
The Scattering Matrix for Stark Effect Hamiltonians.
Peter D. Hislop*, University of Kentucky
(94081339)

4:30 p.m.
On a Minimax Principle for the Eigenvalues in Spectral Gaps.
Marcel J Griesemer*, University of Alabama at Birmingham
Heinz Siedentop, Universitaet Regensburg
(94035194)

5:00 p.m.
Abstract quantization in the presence of constraints.
John R. Klauder*, University of Florida
(9408179)

5:30 p.m.
Derivative Recursion Formulas for Linear SecondOrder Differential Equations.
Andrew Gary Childs*, University of North Alabama
(9403419)

Friday March 12, 1999, 2:30 p.m.4:35 p.m.
Special Session on Geometry of Interacting Particles, Random Walks, and Brownian Motion, II
Room 233, W. W. Little Hall Organizers: Irene Hueter, University of Florida hueter@math.ufl.edu
Gregory F. Lawler, Duke University jose@math.duke.edu

2:30 p.m.
Random growth models: some recent results .
Janko Gravner*, University of California, Davis
(9406052)

3:15 p.m.
Uniform Spanning Forests and Collections of Random Walks.
Russell D Lyons*, Indiana University
Itai Benjamini, Weizmann Institute of Science
Oded Schramm, Weizmann Institute of Science
Yuval Peres, Hebrew University of Jerusalem
(94060216)

4:00 p.m.
Packing Dimension and Fine Properties of Stochastic Processes.
Yimin Xiao*, University of Utah
(9406034)

Friday March 12, 1999, 2:30 p.m.5:50 p.m.
Special Session on Algebraic and Geometric Combinatorics, II
Room 207, W. W. Little Hall Organizers: Andrew J. Vince, University of Florida vince@math.ufl.edu
Neil L. White, University of Florida white@math.ufl.edu

2:30 p.m.
Symplectic matroids the easy way.
Timothy Y Chow*, Tellabs Research Center
(94005143)

3:00 p.m.
Recognizing Schubert Cells.
Sergey Fomin*, M.I.T.
Andrei V Zelevinsky, Northeastern University
(94005190)

3:30 p.m.
Double Bruhat cells and groups generated by symplectic transvections.
Andrei V. Zelevinsky*, Northeastern University
(94005232)

4:00 p.m.
The singular locus of a Schubert variety.
Vesselin N. Gasharov*, Cornell University
(94005258)

4:30 p.m.
Boolean Term Orders and the Root System $B_n$.
Diane M Maclagan*, University of California, Berkeley
(94005310)

5:00 p.m.
Brownian motion in a Weyl chamber, noncolliding particles, and random matrices.
David J. Grabiner*, University of Michigan
(94060242)

5:30 p.m.
Index of parabolic subalgebras of $GL(n)$ and {\it meanders}.
Vladimir Dergachev*, University of Pennsylvania
Alexandre Kirillov, University of Pennsylvania
(94022140)

Friday March 12, 1999, 2:30 p.m.5:20 p.m.
Special Session on Probability on Algebraic Structures, II
Room 235, W. W. Little Hall Organizers: Gregory M. Budzban, Southern Illinois University at Carbondale gregb@math.siu.edu
Philip Feinsilver, Southern Illinois University at Carbondale pfeinsil@math.siu.edu
Arunava Mukherjea, University of South Florida arun@math.usf.edu

2:30 p.m.
Symmetric cones as Gelfand pairs: probabilistic applications.
Gerard G. Letac*, Universite Paul Sabatier, 31062 TOULOUSE, France.
(94060100)

3:15 p.m.
Moments of The Wishart Distribution.
Helene M Massam*, University of Virginia, Charlottesville, VA
Gerard G Letac, Universite Paul Sabatier, Toulouse, France
(94062199)

3:45 p.m.
Break

4:00 p.m.
Stochastic processes and operator calculus on quantum groups.
Rene' Schott*, Universite' Henri Poincare'Nancy 1
(9406040)

4:30 p.m.
Le\'vy Processes on Quantum Groups.
Uwe Franz*, ErnstMoritzArndtUniversit\"at Greifswald
(94060101)

5:00 p.m.
Bernstein and SkitovicDarmois Theorems on Algebraic Structures.
Daniel Neuenschwander*, University of Lausanne, Institute for Actuarial Science
(94060245)

Friday March 12, 1999, 2:30 p.m.5:10 p.m.
Special Session on Ergodic Theory and Dynamical Systems, II
Room 223, W. W. Little Hall Organizers: Jonathan L.F. King, University of Florida squash@math.ufl.edu

2:30 p.m.
Finitary Reconstruction of a Measure Preserving Transformation.
Terrence M Adams*, Rhode Island College
Andrew B Nobel, University of North Carolina at Chapel Hill
(94028372)

3:30 p.m.
Infinite ergodic index does not imply power weak mixing for infinite measure preserving transformations.
Terrence Adams, Ohio State University
Nathaniel Friedman, SUNYAlbany
Cesar E. Silva*, Williams College
(94028117)

4:00 p.m.
Baire Category Results for Infinite Measure Preserving Transformations.
Stanley J Eigen*, Northeastern University
(94028364)

4:30 p.m.
Grouprotation factors of onesided shifts.
Karl Petersen*, University of North Carolina, Chapel Hill
(9402837)

Friday March 12, 1999, 3:00 p.m.5:20 p.m.
Special Session on Groups and Geometries, II
Room 201, W. W. Little Hall Organizers: Chat Ho, University of Florida cyh@math.ufl.edu
Peter Sin, University of Florida sin@math.ufl.edu

3:00 p.m.
$Af^*$$Af$ geometries and locally grid graphs of Pfaffian type.
Jonathan I. Hall*, Michigan State University
(94051348)

3:30 p.m.
A local characterization of the long root geometries.
Anna Kasikova, Kansas State University
Ernest Shult*, Kansas State University
(94051285)

4:00 p.m.
A geometric approach to the standard form problem.
Curtis D Bennett, Bowling Green State University
Sergey Shpectorov*, Bowling Green State University
(94020355)

4:30 p.m.
Primitive Ovoids in $O_8^+(q)$.
Athula D Gunawardena*, University of WisconsinWhitewater
(94051328)

5:00 p.m.
Grassmannian Fixed Point Ratios.
Daniel E. Frohardt*, Wayne State University
Kay Magaard, Wayne State University
(94015340)

Friday March 12, 1999, 5:00 p.m.7:00 p.m.
Department of Mathematics Reception
Keene Faculty Center, Dauer Hall
Saturday March 13, 1999

Saturday March 13, 1999, 7:30 a.m.12:00 p.m.
Meeting Registration
Third Floor Atrium, W. W. Little Hall

Saturday March 13, 1999, 7:30 a.m.12:00 p.m.
Book Sale and Exhibit
Room 353, W. W. Little Hall

Saturday March 13, 1999, 8:00 a.m.10:50 a.m.
Special Session on Linear Operator Theory, III
Room 113, W. W. Little Hall Organizers: Leiba Rodman, College of William \& Mary lxrodm@math.wm.edu
Scott A. McCullough, University of Florida sam@math.ufl.edu

8:00 a.m.
Some new results in operator theory.
Don Hadwin*, University of New Hampshire
(94047315)

8:30 a.m.
Invariant subspaces and limits of similarities.
Alan Lambert, UNCC
Srdjan Petrovic*, Western Michigan University
(94047337)

9:00 a.m.
Commutators on Besov spaces.
Zhijian Wu*, Univ of Alabama
(94047326)

9:30 a.m.
Commutant Lifting Theorems.
Tavan T. Trent*, University of Alabama
(94047268)

10:00 a.m.
The bilateral shift on spaces of harmonic functions.
William T Ross*, University of Richmond
(94047138)

10:30 a.m.
Local spectral theory and spectral inclusions.
Michael M. Neumann*, Mississippi State University
(94047280)

Saturday March 13, 1999, 8:00 a.m.10:50 a.m.
Special Session on Algebraic and Geometric Combinatorics, III
Room 207, W. W. Little Hall Organizers: Andrew J. Vince, University of Florida vince@math.ufl.edu
Neil L. White, University of Florida white@math.ufl.edu

8:00 a.m.
Inequalities for the ${\bf cd}$index.
Richard G. Ehrenborg*, Institute for Advanced Study
Louis J. Billera, Cornell University
(94005269)

8:30 a.m.
Interior faces of subdivisions of the simplex.
Margaret M Bayer*, University of Kansas
(94052168)

9:00 a.m.
A Topological Classification of Regular Polytopes.
Egon Schulte*, Northeastern University
(94051272)

9:30 a.m.
A space of tetrahedra .
Eric K Babson*, University of Washington
Paul Gunnells, Columbia University
Richard Scott, Santa Clara University
(94005360)

10:00 a.m.
Polytopal bundles.
Laura Anderson*, Texas A&M University
Nikolai Mnev, Steklov Institute
(94005354)

10:30 a.m.
Systems of parameters for cubical complexes.
Margaret A. Readdy*, Institute for Advanced Study
(94005224)

Saturday March 13, 1999, 8:00 a.m.10:40 a.m.
Special Session on Probability on Algebraic Structures, III
Room 235, W. W. Little Hall Organizers: Gregory M. Budzban, Southern Illinois University at Carbondale gregb@math.siu.edu
Philip Feinsilver, Southern Illinois University at Carbondale pfeinsil@math.siu.edu
Arunava Mukherjea, University of South Florida arun@math.usf.edu

8:00 a.m.
On the embedding problem for infinitely divisible probabilities on groups and semigroups.
M. McCrudden*, University of Manchester
(94060229)

8:50 a.m.
Probability Theory without Probabilities: From Delphic Semigroups to Hungarian semigroups and Further.
Gabor Szekely*, Bowling Green State University
(94060231)

9:30 a.m.
Break

9:50 a.m.
Remarks on MeasureValued Cocycle Equations .
Zbigniew J. Jurek*, University of Wroclaw
(94060233)

10:20 a.m.
InfiniteDimensional Cocycles and Stochastic Systems with Memory.
SalahEldin A. Mohammed*, Southern Illinois University
(94060257)

Saturday March 13, 1999, 8:00 a.m.10:40 a.m.
Special Session on Ergodic Theory and Dynamical Systems, III
Room 223, W. W. Little Hall Organizers: Jonathan L.F. King, University of Florida squash@math.ufl.edu

8:00 a.m.
Higher order mixing for rank one group actions.
Andres del Junco*, University of Toronto
Reem Yassawi, Trent University
(9402856)

9:00 a.m.
A transformation with square roots of all orders but no infinite square root chain.
Blair F Madore*, University of Toronto
(9402846)

9:30 a.m.
Almost Equicontinuous Systems Which are Weakly Disjoint From All Minimals .
Ethan J. Akin*, The City College
Eli Glasner, University of TelAviv
(94034371)

10:00 a.m.
The proximal and regionally proximal relations in minimal flows.
Joseph Auslander*, University of Maryland
(94054180)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Continuum Theory and Dynamical Systems, III
Room 125, W. W. Little Hall Organizers: Philip Boyland, University of Florida boyland@math.ufl.edu
Beverly Brechner, University of Florida brechner@math.ufl.edu
John Mayer, University of Alabama at Birmingham mayer@math.uab.edu

8:30 a.m.
Chain Explosions for Planar Maps.
Evelyn Sander*, George Mason University
(94058353)

9:00 a.m.
The Role of Tangencies in Global Bifurcations for Planar Maps.
Kathleen Alligood*, George Mason University
(94058316)

9:30 a.m.
From the discrete to the continuous.
Judy A. Kennedy*, University of Delaware
(94058244)

10:00 a.m.
The Horseshoe: Pruning and Homoclinic Families.
Andre de Carvalho*, IMS  SUNY at Stony Brook
Toby Hall, University of Liverpool
(94058288)

10:30 a.m.
Rotation Theory.
Micha\l\ Misiurewicz*, IUPUI
(94058198)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on The Erd\H os Legacy and Connections to Florida, III
Room 101, W. W. Little Hall Organizers: Krishnaswami Alladi, University of Florida alladi@math.ufl.edu
Jean Larson, University of Florida jal@math.ufl.edu

8:30 a.m.
Two contradictory conjectures on Carmichael numbers.
Andrew Granville, Math.Dept., U. Georgia
Carl Pomerance*, Math.Dept., U. Georgia
(94011320)

9:00 a.m.
Lasker's game.
David A. Drake*, University of Florida
(94005344)

9:30 a.m.
Two problems of Erdos concerning character sums.
Peter D.T.A. Elliott*, University of Colorado at Boulder
(9401182)

10:00 a.m.
Large values of the number of factorization of an integer into primes.
JeanLouis Nicolas*, Universit\'e ClaudeBernard (Lyon I)
(94011299)

10:30 a.m.
Multiplicative Functions and Small Divisors.
Krishnaswami Alladi*, University of Florida
(94011375)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Finite Groups and Their Representations, III
Room 109, W. W. Little Hall Organizers: Alexandre Turull, University of Florida turull@math.ufl.edu

8:30 a.m.
The extraspecial case of the k[GV] problem.
David H Gluck*, Wayne State University
Kay Magaard, Wayne State University
(94020196)

9:00 a.m.
Orbit sizes and character degrees.
Thomas M Keller*, Southwest Texas State University
(9402062)

9:30 a.m.
Fitting Heights of Solvable Groups with Few Irreducible Character Degrees.
Jeffrey M Riedl*, Ohio State University
(94020188)

10:00 a.m.
The complexity of modules.
Jiping Zhang*, Peking University
(94020191)

10:30 a.m.
Large orbits of supersolvable linear groups.
Thomas R Wolf*, Ohio University
(94020317)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Galois Theory, III
Room 205, W. W. Little Hall Organizers: J. G. Thompson, University of Florida thompson@math.ufl.edu
H. Voelklein, University of Florida helmut@math.ufl.edu

8:30 a.m.
Linear rigidity and symplectic groups.
Karl Strambach*, Universitaet Erlangen
Helmut Voelklein, University of Florida
(94020118)

9:00 a.m.
A family of curves with many rational points, constructed by rigidity.
Gerhard Frey, University of Essen
Ernst Kani, Queens University
Helmut Voelklein*, University of Florida
(94014250)

9:30 a.m.
Curves with infinite Krational geometric fundamental group.
Gerhard Frey, Universitaet Essen
Ernst Kani*, Queen's University
Helmut Voelklein, University of Florida
(94011311)

10:00 a.m.
Deformation of covers of the Riemann sphere along highly singular curves.
Michael Dettweiler*, University of Erlangen
(94014215)

10:30 a.m.
On rigid tuples in linear groups of odd dimension.
Stefan Reiter*, Univ. of Heidelberg
Michael Dettweiler, Univ. of Erlangen
(94020300)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Groups and Geometries, III
Room 201, W. W. Little Hall Organizers: Chat Ho, University of Florida cyh@math.ufl.edu
Peter Sin, University of Florida sin@math.ufl.edu

8:30 a.m.
The Even Type Theorem for quasithin groups.
Michael Aschbacher*, Caltech
(94020210)

9:00 a.m.
Classification of finite simple groups.
Gernot Stroth*, Universit\"at Halle Wittenberg
Bernd Stellmacher, Universit\"at Kiel
Ulrich Meierfrankenfeld, Michigan State University, East Lansing
(94020115)

9:30 a.m.
Geometric Techniques in the classification of Quasithin Groups.
Stephen D Smith*, U IllinoisChicago
(9402077)

10:00 a.m.
Discussion

10:30 a.m.
Discussion

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Computability Theory, III
Room 217, W. W. Little Hall Organizers: Douglas Cenzer, University of Florida cenzer@math.ufl.edu
Geoffrey Louis LaForte, University of West Florida glaforte@coginst.uwf.edu
Rick L. Smith, University of Florida rs@math.ufl.edu

8:30 a.m.
On the lattice of c.e. subalgebras of a computable Boolean algebra.
Jeffrey B. Remmel*, University of California, San Diego
Jinghui Yang, Qualcomm
(94003286)

9:00 a.m.
$\Delta_{2}^{0}$categorical linear orderings and Boolean algebras.
Charles F. McCoy*, University of Notre Dame
(94003227)

9:30 a.m.
The $\Delta^0_2$Spectrum of a Linear Order.
Russell G. Miller*, University of Chicago
(94003146)

10:00 a.m.
Degree Spectra of Relations on Algebraic Structures.
Denis R. Hirschfeldt*, Department of Mathematics, Cornell University
(94003235)

10:30 a.m.
Ramsey's theorem for computably enumerable partitions.
Tamara J. Hummel*, Allegheny College
Carl G. Jockusch, Jr., University of Illinois
(94003222)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Geometric Topology, III
Room 121, W. W. Little Hall Organizers: James E. Keesling, University of Florida jek@math.ufl.edu
Alexander N. Dranishnikov, University of Florida dranish@math.ufl.edu

8:30 a.m.
Topological equivalence of discontinuous norms.
Jan J. Dijkstra*, The University of Alabama
Jan van Mill, Vrije Universiteit
(94057308)

9:00 a.m.
A noncontractible celllike compactum whose suspension is contractible.
Du\v{s}an Repov\v{s}*, University of Ljubljana
(9405707)

9:30 a.m.
Universal Metric Spaces and Extension Dimension.
Alex Chigogidze*, University of Saskatchewan
Vesko Valov, University of Swaziland
(9405778)

10:00 a.m.
Function spaces and shape theories.
Jerzy Dydak*, University of Tennessee
(94055145)

10:30 a.m.
On homogical BorsukSieklucki Theorem .
Rolando Jimenez*, Instituto de Matematicas, UNAM
Evgeny Shchepin, Instituto de Matematicas, UNAM
(94054239)

Saturday March 13, 1999, 8:30 a.m.10:50 a.m.
Special Session on Partial Differential Equations and Applications, III
Room 219, W. W. Little Hall Organizers: Gang Bao, University of Florida bao@math.ufl.edu
Yunmei Chen, University of Florida yun@math.ufl.edu

8:30 a.m.
Exponential Decay of Solutions to Nonlinear parabolic Systems.
Zhengfang Zhou*, Michigan State University
(94035291)

9:00 a.m.
Rank One and Rank Zero Sets of Harmonic Mappings .
Qing Han*, University of Notre Dame/New York University
(94035211)

9:30 a.m.
Qualitative behavior of solutions to chemotactic diffusion systems: effects of motility and chemotaxis.
Xuefeng Wang*, Tulane University
(94092102)

10:00 a.m.
Existence of entire large positive solutions of semilinear elliptic systems.
Alan V. Lair, Air Force Institute of Technology
Aihua W. Wood*, Air Force Institute of Technology
(9403567)

10:30 a.m.
A reverse estimate for Hodge decomposition of $p$Laplacian type nonlinear operators.
Baisheng Yan*, Michigan State University
(9403536)

Saturday March 13, 1999, 8:45 a.m.10:50 a.m.
Special Session on Geometry of Interacting Particles, Random Walks, and Brownian Motion, III
Room 233, W. W. Little Hall Organizers: Irene Hueter, University of Florida hueter@math.ufl.edu
Gregory F. Lawler, Duke University jose@math.duke.edu

8:45 a.m.
Anisotropic contact process and percolation on trees between phase transitions.
Irene Hueter*, University of Florida, Gainesville, FL
(94060252)

9:30 a.m.
Surface Tension and Wulff construction in three or more dimensions.
Raphael Cerf, Universite Paris Sud
Agoston Pisztora*, Carnegie Mellon University
(94060150)

10:15 a.m.
Boundary Fluctuations in Wulff Droplets.
Kenneth S. Alexander*, University of Southern California
(94060330)

Saturday March 13, 1999, 9:00 a.m.10:50 a.m.
Special Session on Markov Processes and Potential Theory, III
Room 239, W. W. Little Hall Organizers: Joe Glover, University of Florida glover@math.ufl.edu
Murali Rao, University of Florida rao@math.ufl.edu

9:00 a.m.
Crossing Estimates for Symmetric Markov Processes.
ZhenQing Chen, University of Washington
Patrick J. Fitzsimmons, University of California, San Diego
Renming Song*, University of Illinois
(94060129)

9:30 a.m.
Boundary Harnack Principle for Symmetric Stable Processes.
Renming Song, University of Illinois
JangMei Wu*, University of Illinois
(94031128)

10:00 a.m.
Isometric stochastic flows on spheres.
Ming Liao*, Auburn University
(9406043)

10:30 a.m.
Asymptotics of Brownian firstpassage time over a stochastic boundary based on the local time.
Zoran Vondra\v cek*, University of Zagreb
(9406086)

Saturday March 13, 1999, 9:00 a.m.10:50 a.m.
Special Session on Structure and Representation Theory of LatticeOrdered Groups and fRings, III
Room 203, W. W. Little Hall Organizers: Jorge Martinez, University of Florida martinez@math.ufl.edu

9:00 a.m.
Nilpotent elements in totally ordered commutative rings.
James J Madden*, Louisiana State University
(94006270)

9:30 a.m.
A classification of totally ordered positive commutative nilmonoids with 6,7, and 8 elements.
Gretchen W Whipple*, Louisiana State University
(94006133)

10:00 a.m.
Properties of semigroup rings as frings.
Chawne M. Kimber*, University of Florida
(9400685)

10:30 a.m.
$F^*$rings are $O^*$.
Piotr J Wojciechowski*, The University of Texas at El Paso
(94006154)

Saturday March 13, 1999, 9:00 a.m.10:50 a.m.
Special Session on Analytical Problems in Mathematical Physics, III
Room 127, W. W. Little Hall Organizers: Eric A. Carlen, Georgia Institute of Technology carlen@math.gatech.edu
Laszlo Erdos, Courant Institute, NYU erdos@cims.nyu.edu

8:30 a.m.
Atoms in magnetic fields: The high field limit at fixed nuclear charge.
Jan Philip Solovej, Univ. of Copenhagen
Jakob Yngvason*, Univ. of Vienna
(94081261)

9:00 a.m.
On the spectrum of interface states in the XXZ model.
Bruno L Nachtergaele*, UC Davis
(94082362)

9:30 a.m.
On the stationary state of a model in nonequilibrium statistical mechanics.
Lawrence E. Thomas*, University of virginia
(94082200)

10:00 a.m.
Cases of Equality in Bobkov's Inequaltiy and in Gaussian Rearrangement.
Eric A. Carlen, Georgia Institute of Technology
J. Clayton Kerce*, Georgia Institue of Technology
(94046195)

Saturday March 13, 1999, 11:10 a.m.12:00 p.m.
Invited Address
Geometric and fractal properties of the path of a Brownian particle.
Main Lecture Hall, Carleton Auditorium
Gregory F. Lawler*, Duke University
(9406023)

Saturday March 13, 1999, 1:25 p.m.2:15 p.m.
Invited Address
Dimension theory and the Novikov conjecture.
Main Lecture Hall, Carleton Auditorium
Alexander N. Dranishnikov*, University of Florida
(9402001)

Saturday March 13, 1999, 2:30 p.m.4:50 p.m.
Special Session on The Erd\H os Legacy and Connections to Florida, IV
Room 101, W. W. Little Hall Organizers: Krishnaswami Alladi, University of Florida alladi@math.ufl.edu
Jean Larson, University of Florida jal@math.ufl.edu

2:30 p.m.
Some Progress on Erdos Problems.
Andras Hajnal*, Rutgers University
(9400427)

3:00 p.m.
An Amusing Combinatorial Problem.
Carl Darby*, UNLV
(94004318)

3:30 p.m.
Paul Erd\H{o}s and Discrepancy Theory.
Vera T. S\'os*, Mathematical Institute of the Hungarian Academy of Sciences
(94011296)

4:00 p.m.
Paul Erdos and the Southeastern Conferences on Combinatorics, Graph Theory and Computing.
Frederick Hoffman*, Florida Atlantic University
(94005338)

4:30 p.m.
Partitions and Selections in planar geometry.
R. Daniel Mauldin*, University of North Texas
(94004223)

Saturday March 13, 1999, 2:30 p.m.4:20 p.m.
Special Session on Markov Processes and Potential Theory, IV
Room 239, W. W. Little Hall Organizers: Joe Glover, University of Florida glover@math.ufl.edu
Murali Rao, University of Florida rao@math.ufl.edu

2:30 p.m.
Some general results involving stationary random measures.
Olav H Kallenberg*, Auburn University
(94060307)

3:00 p.m.
Excessive Functions Related to $\Gamma$Potentials.
Joseph Glover, University of Florida
Zoran R PopStojanovi{\'c}*, University of Florida
Murali Rao, University of Florida
Renming Song, University of Illinois at UrbanaChampaign
Hrvoje {\v S}iki{\'c}, Washington University, St. Louis
(94060108)

3:30 p.m.
Path measure limits for conditional survival distributions of Brownian motion in an obstacle setting.
Sunder Sethuraman*, Iowa State University
(94060142)

4:00 p.m.
Exit time moments for Brownian motion, Poisson problems and Riemannian geometry.
Patrick T McDonald*, New College of USF
(94031365)

Saturday March 13, 1999, 2:30 p.m.4:50 p.m.
Special Session on Finite Groups and Their Representations, IV
Room 109, W. W. Little Hall Organizers: Alexandre Turull, University of Florida turull@math.ufl.edu

2:30 p.m.
Irreducible tensor products over symmetric group.
Christine Bessenrodt, OttovonGuerickeUniversitat Magdeburg
Alexander Kleshchev*, University of Oregon
(94020126)

3:00 p.m.
Reduction mod $p$ of unramified representations of finite groups of Lie type.
Pham Huu Tiep*, University of Florida
Alexander E. Zalesskii, University of East Anglia
(94020214)

3:30 p.m.
Simply Connected, Adjoint and Universal Groups of Lie Type.
Peter Paul Schmid*, Mathematisches Institut, University of Tuebingen
(9402066)

4:00 p.m.
Restrictions of $\Omega_{m}(q)$modules to alternating groups.
William J Husen*, Ohio State University
(9402015)

4:30 p.m.
Finite subgroups of Lie groups.
Robert L. Griess, Jr.*, University of Michigan
(94020368)

Saturday March 13, 1999, 2:30 p.m.4:50 p.m.
Special Session on Galois Theory, IV
Room 205, W. W. Little Hall Organizers: J. G. Thompson, University of Florida thompson@math.ufl.edu
H. Voelklein, University of Florida helmut@math.ufl.edu

2:30 p.m.
A Nilpotent Weil pairing and application of the Nilpotent TateGrassmanian to the Inverse Galois Problem.
Michael David Fried*, UC Irvine
(94014158)

3:00 p.m.
Conjectural Galois Extensions of Q with Galois group SL(3,3).
Avner D Ash*, Ohio State University
(9401153)

3:30 p.m.
Field of moduli vs field of definition and central extensions as Galois groups.
Stefan Wewers*, University of Pennsylvania
(94011243)

4:00 p.m.
Realizing the Alternating Groups as Monodromy Groups of Meromorphic Functions on Genus One Riemann Surfaces.
Mike Fried, University of California at Irvine
Eric P Klassen*, Florida State University
Yaacov Kopeliovich, Parametric Technologies
(94030197)

4:30 p.m.
Equations for a Hurwitz space associated with degree 7 elliptic subfields of genus 2 function fields.
Vishwa Krishnamoorthy*, University of Florida
Tanush Shaska, University of Florida
(94012287)

Saturday March 13, 1999, 2:30 p.m.4:20 p.m.
Special Session on Groups and Geometries, IV
Room 201, W. W. Little Hall Organizers: Chat Ho, University of Florida cyh@math.ufl.edu
Peter Sin, University of Florida sin@math.ufl.edu

2:30 p.m.
Classification of some Griesmer bound codes.
Wolfgang Willems*, University of Magdeburg
(94094116)

3:00 p.m.
2Rank and the Chromatic Number of a Graph.
Chris D Godsil*, University of Waterloo
Gordon F Royle, University of Western Australia
(94005325)

3:30 p.m.
On certain Schur rings of dimension 4.
Kenzi Akiyama*, Department of Applied Mathematics, Fukuoka University, Fukuoka 8140180, Japan
(94020134)

4:00 p.m.
Recent Results on Difference Sets with Classical Parameters.
Qing Xiang*, University of Delaware
(94005135)

Saturday March 13, 1999, 2:30 p.m.5:50 p.m.
Special Session on Computability Theory, IV
Room 217, W. W. Little Hall Organizers: Douglas Cenzer, University of Florida cenzer@math.ufl.edu
Geoffrey Louis LaForte, University of West Florida glaforte@coginst.uwf.edu
Rick L. Smith, University of Florida rs@math.ufl.edu

2:30 p.m.
Minimality questions and completions of PA.
Julia F. Knight*, University of Notre Dame
(94003103)

3:00 p.m.
Effective Robinson Forcing.
Walker M. White*, Cornell University
(94003247)

3:30 p.m.
Relative Computability of Models and Enumerations.
Alex M McAllister*, Dartmouth College
(94003277)

4:00 p.m.
Computably enumerable relations on computable structures.
Valentina S Harizanov*, The George Washington University
(94003259)

4:30 p.m.
On Automata Presentable Structures.
Bakhadyr M Khoussainov*, The University of Auckland
Sasha Rubin, The University of Auckland
(94003119)

5:00 p.m.
Generalized Weak Presentations.
Alexandra Shlapentokh*, East Carolina University, Greenville, NC 27858
(94003193)

5:30 p.m.
Reflection Principles and Constructive Large Cardinals.
Edward R. Griffor*, CAI
(94003271)

Saturday March 13, 1999, 2:30 p.m.5:20 p.m.
Special Session on Geometric Topology, IV
Room 121, W. W. Little Hall Organizers: James E. Keesling, University of Florida jek@math.ufl.edu
Alexander N. Dranishnikov, University of Florida dranish@math.ufl.edu

2:30 p.m.
Covering spaces of aspherical manifolds.
Hanspeter Fischer, Brigham Young University
David G. Wright*, Brigham Young University
(94057359)

3:00 p.m.
Holey Coronas: A solution of the GrunbaumShephard conjecture on convex isohedral tilings.
Wlodzimierz Kuperberg*, Auburn University
(9405299)

3:30 p.m.
On the lower estimation of the dimension of intersections.
Evgeny V Shchepin*, Steklov Math. Inst.
(94057240)

4:00 p.m.
Planar Sets are Aspherical.
Andreas Zastrow*, RuhrUniversitaet Bochum
(94055314)

4:30 p.m.
Boundaries of right angled Coxeter groups with manifold nerves.
Hanspeter Fischer*, Brigham Young University
(94057175)

5:00 p.m.
Hyperbolic groups are hyperhopfian.
Robert J Daverman*, University of Tennessee
(9405768)

Saturday March 13, 1999, 2:30 p.m.6:20 p.m.
Special Session on Linear Operator Theory, IV
Room 113, W. W. Little Hall Organizers: Leiba Rodman, College of William \& Mary lxrodm@math.wm.edu
Scott A. McCullough, University of Florida sam@math.ufl.edu

2:30 p.m.
The Friedrichs operator of a planar domain.
Mihai Putinar*, University of California
Harold S Shapiro, Royal Institute of Technology Stockholm
(9403011)

3:00 p.m.
Local semigroups of isometries and applications.
Ram\'on Bruzual*, Universidad Central de Venezuela
(9404744)

3:30 p.m.
The commutator structure of operator ideals.
Kenneth J Dykema, Odense University
Tadeusz Figiel, Inst. of Mathematics PAN
Gary Weiss*, University of Cincinnati
Mariusz Wodzicki, Berkeley
(9404713)

4:00 p.m.
Contractive Extension Problems for Matrix Valued Almost Periodic Functions of Several Variables.
Leiba Rodman, The College of William and Mary
Ilya M Spitkovsky, The College of William and Mary
Hugo J Woerdeman*, The College of William and Mary
(94047169)

4:30 p.m.
Representations of holomorphic functions on the polydisc.
Linda J. Patton*, Cal Poly, San Luis Obispo
Mihai Putinar, University of Califonia, Santa Barbara
(94047218)

5:00 p.m.
On the limit of a one parameter family of exponentials of two operators.
Gaspar Porta*, University of Chicago
(94047378)

5:30 p.m.
A characterization of band preserving projection operators.
Yuri A Abramovich*, IUPUI
Arkady K Kitover, CCP
(94047159)

6:00 p.m.
Interpolation with symmetries and twopoint interpolation in Hardy class.
Daniel Alpay, BenGurion University of the Negev, Israel
Vladimir Bolotnikov, College of William and Mary, Williamsburg, Virginia
Leiba Rodman*, College of William and Mary, Williamsburg, Virginia
(9404731)

Saturday March 13, 1999, 2:30 p.m.5:20 p.m.
Special Session on Partial Differential Equations and Applications, IV
Room 219, W. W. Little Hall Organizers: Gang Bao, University of Florida bao@math.ufl.edu
Yunmei Chen, University of Florida yun@math.ufl.edu

2:30 p.m.
On the Optimal Control Problems Governed by Partial Differential Equations.
Mohsen Razzaghi*, Mississippi State University
(9404957)

3:00 p.m.
On Oscillations of an Asymptotic Equation of a Nonlinear Wave Equation .
Ping Zhang, Academia Sinica
Yuxi Zheng*, Indiana University
(94035292)

3:30 p.m.
Time periodic solutions of a class of nonlinear dispersive wave equations.
BingYu Zhang*, University of Cincinnati
(94035105)

4:00 p.m.
A Variational Principle to the Kramers Equation.
Chaocheng Huang*, Wright State University
(94035109)

4:30 p.m.
"Image Restoration via Heat Flow Method".
Celia A. Z. Barcelos*, Universidade Federal de Uberlandia
Yunmei Chen, University of Florida
(94035220)

5:00 p.m.
A RayleighRitz method applied to a twodimensional inverse spectral problem.
C. Maeve McCarthy*, Murray State University
(9403522)

Saturday March 13, 1999, 2:30 p.m.4:20 p.m.
Special Session on Structure and Representation Theory of LatticeOrdered Groups and fRings, IV
Room 203, W. W. Little Hall Organizers: Jorge Martinez, University of Florida martinez@math.ufl.edu

2:30 p.m.
A Structure Theorem for Residuated Lattices.
Constantine Tsinakis*, Vanderbilt University
(94006322)

3:00 p.m.
LatticeOrdered Quotients.
R H Redfield*, Hamilton College
(94006171)

3:30 p.m.
Hyperspecialvalued latticeordered groups.
Michael R. Darnel*, Indiana University South Bend
Jorge Martinez, University of Florida
(9400655)

4:00 p.m.
A Noncompactifiable $Q$Flow.
Richard N. Ball*, University of Denver
James N. Hagler, University of Denver
(94006249)

Saturday March 13, 1999, 2:30 p.m.4:35 p.m.
Special Session on Geometry of Interacting Particles, Random Walks, and Brownian Motion, IV
Room 233, W. W. Little Hall Organizers: Irene Hueter, University of Florida hueter@math.ufl.edu
Gregory F. Lawler, Duke University jose@math.duke.edu

2:30 p.m.
A martingale approach in the study of percolation clusters.
Yu Zhang*, University of Colorado, Colorado Springs, CO 80933
(94060298)

3:15 p.m.
Purity of the Limit Distribution for Random Walks in Matrices.
Arunava Mukherjea*, University of South Florida, Tampa, FL
(94060302)

4:00 p.m.
The Effect of Finite Memory Cutoff On Loop Erased Walk In 3 Dimensions.
Aklilu Zeleke*, Alma College
(9406030)

Saturday March 13, 1999, 2:30 p.m.5:20 p.m.
Special Session on Algebraic and Geometric Combinatorics, IV
Room 207, W. W. Little Hall Organizers: Andrew J. Vince, University of Florida vince@math.ufl.edu
Neil L. White, University of Florida white@math.ufl.edu

2:30 p.m.
The $k$consecutive Arrangements.
Bruce E. Sagan*, Department of Mathematics, Michigan State University, East Lansing, MI, 488241027
William Brockman, Department of Mathematics, Michigan State University, East Lansing, MI, 488241027
(9400525)

3:00 p.m.
A combinatorial proof of the logconcavity of the numbers of permutations with $k$ runs.
Mikl\'os B\'ona*, IAS
Richard Ehrenborg, IAS
(9400545)

3:30 p.m.
The intersection lattice of a discriminantal arrangement.
Christos A Athanasiadis*, Instructor
(94005111)

4:00 p.m.
Aztec dungeons and powers of 13.
Mihai A Ciucu*, Georgia Institute of Technology
(94005262)

4:30 p.m.
Graphical generalizations of the sieve formula.
Gabor Hetyei*, University of Kansas
(9400564)

5:00 p.m.
Pieri Operators on Posets.
Nantel Bergeron, York University
Stefan Mykytiuk, York University
Frank Sottile*, University of Wisconsin
Stephanie van Willigenburg, York University
(9400574)

Saturday March 13, 1999, 2:30 p.m.5:30 p.m.
Special Session on Probability on Algebraic Structures, IV
Room 235, W. W. Little Hall Organizers: Gregory M. Budzban, Southern Illinois University at Carbondale gregb@math.siu.edu
Philip Feinsilver, Southern Illinois University at Carbondale pfeinsil@math.siu.edu
Arunava Mukherjea, University of South Florida arun@math.usf.edu

2:30 p.m.
Algebraic Aspects of Probability Theory.
Valeri Maximow*, Uniwersytet w Bialymstoku
(94060345)

3:20 p.m.
Topics in random matrix theory.
Goran Hognas*, Abo Akademi University
(94060284)

4:00 p.m.
Break

4:20 p.m.
Arithmetics of Probability Measures on Symmetric Spaces.
Piotr Graczyk*, Universite d'Angers
(94060234)

4:50 p.m.
On shifted convolution powers and concentration functions in locally compact groups.
Wojciech Jaworski*, School of Mathematics and Statistics, Carleton University, Ottawa, Ontario, Canada K1S 5B6
(94060217)

Saturday March 13, 1999, 2:30 p.m.6:30 p.m.
Special Session on Ergodic Theory and Dynamical Systems, IV
Room 223, W. W. Little Hall Organizers: Jonathan L.F. King, University of Florida squash@math.ufl.edu

2:30 p.m.
Billiards on surfaces of constant curvature.
Eugene Gutkin*, USC
(9405851)

3:30 p.m.
A HalfCommutative IP Roth Theorem .
Randall G McCutcheon*, University of Maryland
(9402847)

4:30 p.m.
Oscillation inequalities in ergodic theory, the multiparameter case.
Roger L. Jones*, DePaul University
Joseph Rosenblatt, University of Illinois at Urbana
M\'at\'e Wierdl, University of Memphis
(9402648)

5:20 p.m.
Different Kinds of Stability in Dynamical Systems.
Donald Ornstein*, Stanford University
(94028382)

6:00 p.m.
Residuality and Orbit Equivalence.
Daniel J. Rudolph*, University of Maryland
(9402838)

Saturday March 13, 1999, 2:45 p.m.5:10 p.m.
Session for Contributed Papers, I
Room 127, W. W. Little Hall

2:45 p.m.
New linear codes over $F_3$ and $F_5$ and improvements on bounds.
Irfan Siap*, The Ohio State University
Dijen K. RayChaudhuri, The Ohio State University
(9400517)

3:00 p.m.
On The Existence of Generating Pair for Simple pAnalytic Matrix Functions.
G P Youvaraj*, Emporia State University
(94035187)

3:15 p.m.
The Doorstep Method of Polynomial Stablization.
C. S. Felicitas*, C.F.C.T.E., Inc.
(94033120)

3:30 p.m.
Asymptotic Expansions and LogConcavity for Coefficients of Power Series.
Valerio De Angelis*, Xavier University of Louisiana
(9404116)

3:45 p.m.
A short proof of Helly's theorem via \v Cech cohomology.
Ludvik Janos*, Kent State University
(9405541)

4:00 p.m.
Contact process in random environment and weak survival.
Oana Mocioalca*, University of Florida, Gainesville, FL
Irene Hueter, University of Florida, Gainesville, FL
(94060251)

4:15 p.m.
An extension of the list of extreme value distributions.
Boris I. Kunin*, University of Alabama in Huntsville
(94062182)

4:30 p.m.
Break

4:45 p.m.
Sequences of Cards of T(a) from R and the O(t) Embedding.
C. S. Felicitas*, C.F.C.T.E., Inc.
Aghapi Dodona, Pan Asian Congress of Mathematicians
(94001127)

5:00 p.m.
The Beginnings of Algebra and a Solution Result to a Famous Equation.
C. S. Felicitas, C.F.C.T.E., Inc.
Sudhangshu B. Karmakar*, International Committee for ArabIsraeli Reconciliation
(94001123)
Inquiries: meet@ams.org

