
AMS Sectional Meeting Program by Day
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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
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

