
AMS Sectional Meeting Full Program
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1996 Spring Southeastern Sectional Meeting
Baton Rouge, LA, April 1921, 1996
Meeting #911
Associate secretaries: Robert J Daverman, AMS daverman@math.utk.edu
Wednesday April 17, 1996

Wednesday April 17, 1996, 1:30 p.m.4:20 p.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, I
Room E113, Pleasant Hall Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

1:30 p.m.
On bounding the Betti numbers and computing the Euler characteristic of semialgebraic sets.
Saugata Basu*, Courant Institute of Mathematical Sciences, New York University
(91112212)

2:00 p.m.
Complexification and degree of a semialgebraic set.
MarieFrancoise Roy*, University of Rennes I, France
(91111211)

2:30 p.m.
Real factors of analytic polynomials and an application to reparametrization algorithms of real curves.
Tomas Recio*, University of Cantabria, Spain
J. R. Sendra, University Alcala de Henares, Spain
(91114190)

3:00 p.m.
Virtual roots of real polynomials and its applications.
Laureano GonzalezVega*, University of Cantabria, Spain
Henri Lombardi, University of Besancon, France
Louis Mahe, University of Rennes I, France
(91114193)

3:30 p.m.
Critical point methods in computational real algebraic geometry.
Victoria Ann Powers*, Emory University
Eberhard Becker, University of Dortmund, Germany
Thorsten Woermann, University of Dortmund, Germany
(91111139)

4:00 p.m.
On $f$modules over partially ordered rings.
James Joseph Madden, Louisiana State University, Baton Rouge
Scott Woodward*, Southern University
(91106123)
Thursday April 18, 1996

Thursday April 18, 1996, 9:00 a.m.11:20 a.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, II
Room E113, Pleasant Hall Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

9:00 a.m.
Signature of higher level in a commutative ring.
Leslie J. Walter*, University of Saskatchewan
(91113228)

9:30 a.m.
The nonreduced order spectrum of a commutative ring.
Gilbert A. Stengle*, Lehigh University
James F. McEnerney, Princeton University
(91106132)

10:00 a.m.
The $17$th Hilbert problem for real analytic functions.
Piotr Jaworski*, University of Warsaw, Poland
(9111497)

10:30 a.m.
Realnormal field extensions.
M. E. Alonso, University Complutense de Madrid, Spain
M. Pilar Velez*, University Complutense de Madrid, Spain
(91114257)

11:00 a.m.
On separation of semialgebraic sets.
C. Andradas, University Complutense de Madrid, Spain
F. Acquistapace*, University of Pisa, Italy
F. Broglia, University of Pisa, Italy
(91114137)

Thursday April 18, 1996, 1:30 p.m.4:50 p.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, III
Room E113, Pleasant Hall Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

1:30 p.m.
Boolean methods in the theory of quadratic forms.
M. A. Dickmann*, University of Paris VII, France
F. Miraglia, University of Sao Paulo, Brazil
(91114253)

2:00 p.m.
Continuous ultraproducts.
Norman L. Alling*, University of Rochester
(9115445)

2:30 p.m.
Remarks on the prime spectra of latticeordered abelian groups.
Roberto Cignoli, University of Buenos Aires, Argentina
Daniel Gluschankof*, University of Angers, France
Francois Lucas, University of Angers, France
(91106135)

3:00 p.m.
A new look at biseparating maps {\rm II}.
Melvin Henriksen*, Harvey Mudd College
(91106117)

3:30 p.m.
Some results on ultrametric spaces.
Sybilla PriessCrampe*, University of Munich, Germany
(91112267)

4:00 p.m.
The exponential rank of nonarchimedean exponential fields.
Franz Viktor Kuhlmann*, University of Heidelberg, Germany
Salma Kuhlmann, University of Heidelberg, Germany
(91114125)

4:30 p.m.
On residually realclosed henselian fields.
Danielle J. GondardCozette*, University of Paris VI, France
Eberhard Becker, University of Dortmund, Germany
Ralph Berr, University of Dortmund, Germany
(91112110)
Friday April 19, 1996

Friday April 19, 1996, 9:00 a.m.11:50 a.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, IV
Room E113, Pleasant Hall Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

9:00 a.m.
Classification of real algebraic curves on toric varieties.
Anatoly Korchagin*, Administrators for the Professions, Brooklyn, New York
(91113268)

9:30 a.m.
Topological control of spatial real algebraic surfaces.
Benoit Chevallier*, University Toulouse le Mirail, France
(9111466)

10:00 a.m.
Rokhlin conjecture and quotients of real algebraic surfaces by complex conjugation.
Sergey Mikhailovich Finashin*, Middle East Technical University, Turkey
(9111458)

10:30 a.m.
Rigid isotopies of real algebraic curves on a hyperboloid.
Victor Ivanovich Zvonilov*, Syktyvkar University, Russia
(9111457)

11:00 a.m.
Combinatorial patchworking real algebraic surfaces.
I. V. Itenberg*, University of Rennes I, France
(9111486)

11:30 a.m.
On the decomposing algebraic curves.
G. M. Polotovskii*, Nizhny Novgorod University, Russia
(91114103)

Friday April 19, 1996, 12:00 p.m.5:00 p.m.
Meeting Registration
Atrium, HoweRussell Geoscience Complex Building

Friday April 19, 1996, 1:00 p.m.2:00 p.m.
Invited Address
Opening Remarks
Room E130, HoweRussell Geoscience Complex Building
Geography of smooth $4$manifolds.
Room E130, HoweRussell Geoscience Complex Building
Ronald A. Fintushel*, Michigan State University
(9115701)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on LowDimensional Topology, I
Room 124, A. P. Tureaud Building Organizers: Patrick M. Gilmer, Louisiana State University
Rick Litherland, Louisiana State University
Neal W. Stoltzfus, Louisiana State University

2:15 p.m.
Average bending of convex hull boundaries.
Martin J. Bridgeman*, Loyola University
(91158255)

2:45 p.m.
Knot groups, representations and symbolic dynamics.
Daniel S. Silver*, University of South Alabama
Susan Gayle Williams, University of South Alabama
(91157224)

3:15 p.m.
Knot inversion and the isometry groups of hyperbolic $3$manifolds.
Wilbur Whitten*, Lynchburg, Virginia
(9115736)

3:45 p.m.
$4$manifolds are quotients of $R^4$.
Donald D. Lawrence*, University of New Orleans
(9115795)

4:15 p.m.
An extremal property of Rohklin's inequality for real algebraic curves.
Steve Paris*, Northeast Louisiana University
(9115576)

4:45 p.m.
On the homology of branched cyclic covers of knots.
Wayne H. Stevens*, Louisiana State University, Baton Rouge
(91157220)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on Fluid Dynamics
Room 104, A. P. Tureaud Building Organizers: Jerome A. Goldstein, Louisiana State University
Michael Mudi Tom, Louisiana State University

2:15 p.m.
Boussinesq systems for the twoway propagation of water waves.
Jerry L. Bona*, University of Texas, Austin
(91176210)

2:45 p.m.
Ideal magnetofluid turbulence in two dimensions.
Richard Jordan*, Carnegie Mellon University
(91176158)

3:15 p.m.
Stationary solutions of the Benjamin equation.
John P. Albert*, University of Oklahoma
Jerry L. Bona, University of Texas, Austin
Juan Mario Restrepo, Argonne National Laboratory, Argonne, Illinois
(91135206)

3:45 p.m.
On some nonlinear dispersive equations.
Mi Ai Park*, Seoul National University, Korea
(9113594)

4:15 p.m.
Computations of selfsimilar blowup solutions of the generalized Kortewegde Vries Equation.
Daniel B. Dix*, University of South Carolina, Columbia
William R. McKinney, North Carolina State University
(91135199)

4:45 p.m.
Informal discussion

Friday April 19, 1996, 2:15 p.m.5:35 p.m.
Special Session on Number Theory and Quadratic Forms, I
Room 203, A. P. Tureaud Building Organizers: Jurgen Hurrelbrink, Louisiana State University
Jorge F. Morales, Louisiana State University
Robert V. Perlis, Louisiana State University
Paul B. Van Wamelen, Louisiana State University

2:15 p.m.
Growth of number of spinor genera in ${\bf Z}_p$extensions.
Wai Kiu Chan*, Ohio State University, Columbus
(91111239)

2:45 p.m.
Normsets and factorization properties of rings of integers.
James Barker Coykendall, IV*, Lehigh University
(9111117)

3:15 p.m.
The zeta function of Burkhardt's quartic.
Jerome William Hoffman*, Louisiana State University, Baton Rouge
Steven H. Weintraub, Louisiana State University, Baton Rouge
(9111119)

3:45 p.m.
Number of solutions of a pair of quadratic forms over a finite field.
Laura Mann Schueller*, University of Kentucky
(91111241)

4:15 p.m.
Stark units for totally real cubic fields.
Brett A. Tangedal*, University of Vermont
(9111130)

4:45 p.m.
Wittkernels for elliptic and hyperelliptic curves.
Jonathan Shick*, Loyola University
(91111240)

5:15 p.m.
On certain corestriction principles.
Nguyen Quoc Thang*, McMaster University
(9111131)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on Stochastic Analysis and Its Applications, I
Room 105, A. P. Tureaud Building Organizers: HuiHsiung Kuo, Louisiana State University
Ambar Niel Sengupta, Louisiana State University

2:15 p.m.
$L^p$estimates for stochastic integrals.
Klaus R. Bichteler*, University of Texas, Austin
(91160162)

2:45 p.m.
Area nullification of singular Levy flow.
Dhandapani Kannan*, University of Georgia
(9116029)

3:15 p.m.
A Harnack inequality for difference operators on groups.
Kanji Ichihara*, Nagoya University, Japan
(9116077)

3:45 p.m.
A lattice approximation to the super process.
P. Sundar*, Louisiana State University, Baton Rouge
A. Bose, Carleton University
(91160113)

4:15 p.m.
On $SDE$'s with boundary conditions.
Arturo KohatsuHiga*, Kyoto University, Japan
(9116012)

4:45 p.m.
Expectations for nonreversible Markov chains.
Ian H. Dinwoodie*, Tulane University
(9116010)

Friday April 19, 1996, 2:15 p.m.4:35 p.m.
Special Session on Rings and Modules, I
Room 206, A. P. Tureaud Building Organizers: Ellen E. Kirkman, Wake Forest University
Dan Zacharia, Syracuse University

2:15 p.m.
Tilting modules over splitbynilpotent extensions.
Ibrahim Assem*, University of Sherbrooke
Nikolaos P. Marmaridis, University of Ioannina, Greece
(9111637)

2:45 p.m.
On regular rings with stalks artinian.
Walter D. Burgess*, University of Ottawa
Robert Raphael, Concordia University
(9111605)

3:15 p.m.
Generic modules for domestic algebras.
Andrew P. Dean*, Bishop's University
Ibrahim Assem, University of Sherbrooke
(91116232)

3:45 p.m.
Standard decompositions of algebras.
Vlastimil Dlab*, Carleton University
(91116244)

4:15 p.m.
Hereditary torsion theory counter equivalences.
Robert R. Colby, University of Hawaii, Honolulu
Kent R. Fuller*, University of Iowa
(91116153)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on Geometric Group Theory, I
Room 125, A. P. Tureaud Building Organizers: Stephen G. Brick, University of South Alabama
Jon M. Corson, University of Alabama
Barry S. Spieler, BirminghamSouthern College

2:15 p.m.
Elements of finitely generated groups which belong to no proper tree factor.
John R. Stallings*, University of California, Berkeley
(9112042)

2:45 p.m.
Branched coverings of cubical complexes and subgroups of hyperbolic groups.
Noel Patrick Brady*, University of Utah
(9112075)

3:15 p.m.
Remarks on some triangles of finite groups.
Roger C. Alperin*, San Jose State University
(91120166)

3:45 p.m.
Embedded planes and torsion free subgroups of finite index in triangles of groups.
Paul R. Brown*, University of California, Berkeley
(9112039)

4:15 p.m.
Finite covering spaces of graphs.
Daniel Wise*, Princeton University
(91120250)

4:45 p.m.
Nonpositively curved piecewise Euclidean structures on hyperbolic manifolds.
Gabor Moussong, Eotvos Lorand University, Budapest, Hungary
Ruth M. Charney*, Ohio State University, Columbus
Michael W. Davis, Ohio State University, Columbus
(91153194)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on Real Analytic Geometry and oMinimal Structures, I
Room 120, A. P. Tureaud Building Organizers: Chris Miller, University of Illinois, Chicago
Lou P. van den Dries, University of Illinois, UrbanaChampaign

2:15 p.m.
Are there any best Riemannian structures on a given compact differentiable manifold?
Alexander Nabutovsky*, University of Toronto
(9115333)

2:45 p.m.
Real analyticity stratifications, desingularization, and optimal control.
Hector J. Sussmann*, Rutgers University, New Brunswick
(91132126)

3:15 p.m.
Complexity of the frontier and closure of semipfaffian sets and quantifier simplification for semipfaffian expressions.
Andrei Gabrielov*, Purdue University, West Lafayette
(91114119)

3:45 p.m.
Subpfaffian sets.
Zbigniew Hajto*, CRM, Institut d'Estudis Catalans, Spain
(91114198)

4:15 p.m.
A new model complete and ominimal expansion of the real field.
Lou P. van den Dries, University of Illinois, UrbanaChampaign
Patrick U. Speissegger*, University of Illinois, UrbanaChampaign
(9110350)

4:45 p.m.
Yet another extension of Tamm's theorem.
Chris Miller*, University of Illinois, Chicago
(91114118)

Friday April 19, 1996, 2:15 p.m.5:05 p.m.
Special Session on Representations of Finite Groups, Algebraic Groups, and Lie Algebras, I
Room 205, A. P. Tureaud Building Organizers: Cornelius Pillen, University of South Alabama
Randall R. Holmes, Auburn University, Auburn

2:15 p.m.
The principal block of a restricted Lie algebra.
Jorg Feldvoss*, Florida Atlantic University
(91117146)

2:45 p.m.
Nonperiodic AuslanderReiten components of reduced enveloping algebras.
Rolf Farnsteiner*, University of Wisconsin, Milwaukee
(9112289)

3:15 p.m.
Modular representations of Chevalley groups and finite projective geometry.
Peter Sin*, University of Florida
(9112071)

3:45 p.m.
Affine schemes, irreducible characters of finite groups, and the Green correspondence.
Harald E. Ellers*, Northern Illinois University
George F. Seelinger, Northern Illinois University
(91120115)

4:15 p.m.
Stability of decomposition numbers for finite Chevalley groups.
Leonard Chastkofsky*, University of Georgia
(91120143)

4:45 p.m.
Representations of Lie algebras.
Iaroslav S. Kryliouk*, University of Saskatchewan
(91117251)

Friday April 19, 1996, 2:15 p.m.4:35 p.m.
Special Session on Fixed Point Theory and Dynamical Systems, I
Room 127, A. P. Tureaud Building Organizers: Michael R. Kelly, Loyola University

2:15 p.m.
The topology of the boundaries of Siegel disks of polynomials.
James T. Rogers, Jr.*, Tulane University
(9115898)

2:45 p.m.
Dynamically defined function spaces.
Paul A. Fabel*, Mississippi State University
(91157161)

3:15 p.m.
A proof of the Arnold conjecture for homeomorphisms of orientable two dimensional closed manifolds.
Edward E. Slaminka*, Auburn University, Auburn
(91158254)

3:45 p.m.
Parametrized fixed point theory.
Ross Geoghegan*, State University of New York, Binghamton
Andrew J. Nicas, McMaster University
(9115588)

4:15 p.m.
On expanding endomorphisms of infranilmanifolds.
Kyung Bai Lee*, University of Oklahoma
(91199269)

Friday April 19, 1996, 2:15 p.m.6:05 p.m.
Special Session on Asymptotic Behavior of Difference Equations with Applications, I
Room 109, A. P. Tureaud Building Organizers: Saber N. Elaydi, Trinity University, San Antonio
Vlajko Lj Kocic, Xavier University of Louisiana

2:25 p.m.
Traveling waves in lattice dynamical systems.
ShuiNee Chow*, Georgia Institute of Technology
(9113523)

2:45 p.m.
Asymptotic stability in linear Volterra difference equation.
Saber N. Elaydi*, Trinity University
Satoru Murakami, Okayama University, Japan
(91139159)

3:15 p.m.
Asymptotic solutions to discrete Coulomb equations.
Ronald E. Mickens*, Clark Atlanta University
(9113959)

3:45 p.m.
Open problems and conjectures.
Gerasimos Ladas*, University of Rhode Island
(9113963)

4:15 p.m.
Boundedness and persistence of solutions of the nonautonomous Lyness and Max equation.
Edward A. Grove*, University of Rhode Island
Candace Marie Kent, University of Rhode Island
Gerasimos Ladas, University of Rhode Island
(91139265)

4:45 p.m.
Positive solutions for nonlinear difference equations.
Johnny L. Henderson*, Auburn University, Auburn
(91139173)

5:15 p.m.
Periodic solutions in discrete intraspecific competition models with age structure.
Jia Li*, University of Alabama, Huntsville
Saber N. Elaydi, Trinity University
(91139259)

5:45 p.m.
Asymptotic behavior of discretized SturmLiouville eigenvalue problems.
Martin J. Bohner*, University of Hohenheim, Germany
(91139201)
Saturday April 20, 1996

Saturday April 20, 1996, 8:00 a.m.5:00 p.m.
Meeting Registration
Atrium, HoweRussell Geoscience Complex Building

Saturday April 20, 1996, 8:00 a.m.10:50 a.m.
Special Session on Control Theory
Room 104, A. P. Tureaud Building Organizers: Guillermo Segundo Ferreyra, Louisiana State University
Peter R. Wolenski, Louisiana State University

8:00 a.m.
Regularity of the value function for constrained optimization problems.
Kevin A. Grasse*, University of Oklahoma
(91149104)

8:30 a.m.
Evolutionary semigroups and the stability radius for nonautonomous Cauchy problems.
Yuri D. Latushkin, University of Missouri, Columbia
Timothy W. Randolph*, University of Missouri, Rolla
(9119322)

9:00 a.m.
A numerical method for a class of stochastic control problems.
Kurt Helmes*, University of Kentucky
(91149205)

9:30 a.m.
Bounds for capacities in terms of asymmetry.
Tilak Bhattacharya*, Indian Statistical Institute, India
Allen W. Weitsman, Purdue University, West Lafayette
(9113127)

10:00 a.m.
Supnorm stability for control problems with state constraints.
Asen L. Dontchev, Mathematical Reviews, Ann Arbor, Michigan
William W. Hager*, University of Florida
Kazimierz Malanowski, Polish Academy of Sciences, Poland
(91149197)

10:30 a.m.
How to use derivatives to estimate the extremal values of the function on convex sets: Applications of new meanvalue theorems.
F. H. Clarke, University of Montreal
Yuri Ledyaev*, Steklov Institute of Mathematics, Russia
(91149140)

Saturday April 20, 1996, 8:00 a.m.10:50 a.m.
Special Session on LowDimensional Topology, II
Room 124, A. P. Tureaud Building Organizers: Patrick M. Gilmer, Louisiana State University
Rick Litherland, Louisiana State University
Neal W. Stoltzfus, Louisiana State University

8:00 a.m.
Floer homology of ends of fourmanifolds.
Zarko Bizaca*, University of Texas, Austin
Daniel Ruberman, Brandeis University
(9115791)

8:30 a.m.
The spectral flow of the odd signature operator and higher Massey products.
Paul A. Kirk, Indiana University, Bloomington
Eric P. Klassen*, Florida State University
(91158127)

9:00 a.m.
Some remarks on complex surfaces and smooth $4$manifolds.
Ronald J. Stern*, University of California, Irvine
(91157234)

9:30 a.m.
Tight contact structures and SeibergWitten invariants.
Gordana Matic*, University of Georgia
Paolo Lisca, Columbia University
(91157225)

10:00 a.m.
CassonLin's invariant and Floer homology.
Weiping Li*, Oklahoma State University, Stillwater
(91157209)

10:30 a.m.
An equivariant Casson invariant for $3$manifold with cyclic group action.
Sylvain E. Cappell, Courant Institute of Mathematical Sciences, New York University
Ronnie Lee*, Yale University
Edward Y. Miller, Polytechnic University
(9115773)

Saturday April 20, 1996, 8:00 a.m.10:50 a.m.
Special Session on Number Theory and Quadratic Forms II
Room 203, A. P. Tureaud Building Organizers: Jurgen Hurrelbrink, Louisiana State University
Jorge F. Morales, Louisiana State University
Robert V. Perlis, Louisiana State University
Paul B. Van Wamelen, Louisiana State University

8:00 a.m.
Almost strong approximation for definite quadratic forms.
J. S. Hsia*, Ohio State University, Columbus
(91111116)

8:30 a.m.
Nonunimodular Hermitian forms over $p$adic algebras.
Laura Fainsilber*, University of FrancheComte, France
(91111262)

9:00 a.m.
Bianchi groups and integral quadratic forms.
Donald G. James*, Pennsylvania State University, University Park
(9111118)

9:30 a.m.
Commutators in orthogonal groups.
Alexander J. Hahn*, University of Notre Dame
(91111260)

10:00 a.m.
Orthogonal representations of finite groups.
Carl R. Riehm*, McMaster University
(9111128)

10:30 a.m.
Memories of Olga Tausskey Todd.
Dennis R. Estes*, University of Southern California
(9111164)

Saturday April 20, 1996, 8:00 a.m.10:50 a.m.
Special Session on Asymptotic Behavior of Difference Equations with Applications, II
Room 109, A. P. Tureaud Building Organizers: Saber N. Elaydi, Trinity University, San Antonio
Vlajko Lj Kocic, Xavier University of Louisiana

8:00 a.m.
A discrete model of insect population dynamics.
Jim M. Cushing*, University of Arizona
(91192176)

8:30 a.m.
Extinction and persistence of species in discrete competitive systems with diffusion.
John E. Franke*, North Carolina State University, Raleigh
AbdulAziz Yakubu, Howard University
(91192138)

9:00 a.m.
Global behavior of solutions of $x_{n+1} = ax_{n} + f(x_{n},x_{n1})$.
Gur Dial, Xavier University
Vlajko Lj Kocic*, Xavier University
(91139174)

9:30 a.m.
Local and global behavior of solutions of $x_{n+1} = \frac{1+x_{n}^{p}}{x_{n}^{q}x_{n1}^{r}}$.
Elia V. Eschenazi*, Xavier University
Vlajko Lj Kocic, Xavier University
(91139175)

10:00 a.m.
On behavior of solutions of a forced difference equation I: Asymptotic representation of solutions.
John R. Graef, Mississippi State University
Chuanxi Qian*, Mississippi State University
(91139184)

10:30 a.m.
On behavior of solutions of a forced difference equation II: Convergence to zero.
John R. Graef*, Mississippi State University
Chuanxi Qian, Mississippi State University
(91139204)

Saturday April 20, 1996, 8:30 a.m.10:50 a.m.
Special Session on Stochastic Analysis and Its Applications, II
Room 105, A. P. Tureaud Building Organizers: HuiHsiung Kuo, Louisiana State University
Ambar Niel Sengupta, Louisiana State University

8:30 a.m.
Critical intensities in continuum percolation.
Rahul Roy*, Indian Statistical Institute, India
(9116084)

9:00 a.m.
Transformations of measure via a homotopy technique.
Denis R. Bell*, University of North Florida
(91160155)

9:30 a.m.
Exponential convergence for a system of conuclear space valued diffusions with meanfield interaction.
Jie Xiong*, University of Tennessee, Knoxville
(9116020)

10:00 a.m.
The L\'evy Laplacian and a transformation in white noise calculus.
Kimiaki Saito*, Meijo University, Japan
(9116055)

10:30 a.m.
Stochastic differential equations in abstract Weiner space.
Fariborz Asadian*, Fort Valley State College
(91160133)

Saturday April 20, 1996, 8:30 a.m.10:50 a.m.
Special Session on Geometric Group Theory, II
Room 125, A. P. Tureaud Building Organizers: Stephen G. Brick, University of South Alabama
Jon M. Corson, University of Alabama
Barry S. Spieler, BirminghamSouthern College

8:30 a.m.
Aspherical group presentations.
Robert F. Craggs*, University of Illinois, UrbanaChampaign
(91157145)

9:00 a.m.
On ribbon disc complements and related $2$complexes.
Catherine E. Cavagnaro*, University of the South
(91120218)

9:30 a.m.
On split $2$complexes.
Will Haight, II*, University of the South
(91120216)

10:00 a.m.
An equivariant Whitehead algorithm and conjugacy in Aut($F_n$).
Sava Krstic, Tufts University
Martin Lustig, Ruhr University, Germany
Karen Vogtmann*, Cornell University
(91120249)

10:30 a.m.
The conjugacy problem in $C"(2,p)T"(q)$ groups.
Karin Luisa Johnsgard*, Cornell University
Mile P. Krajcevski, University of South Florida
(91120122)

Saturday April 20, 1996, 8:30 a.m.10:50 a.m.
Special Session on Representations of Finite Groups, Algebraic Groups, and Lie Algebras, II
Room 205, A. P. Tureaud Building Organizers: Cornelius Pillen, University of South Alabama
Randall R. Holmes, Auburn University, Auburn

8:30 a.m.
Blocks of reduced enveloping algebras.
James E. Humphreys*, University of Massachusetts, Amherst
(91117152)

9:00 a.m.
Quantum deformations of Verma modules of Borcherds superalgebras.
Georgia M. Benkart, University of Wisconsin, Madison
SeokJin Kang, Seoul National University, Korea
Duncan J. Melville*, Saint Lawrence University
(91117168)

9:30 a.m.
Hopf algebras and representations.
Dmitriy Rumynin*, University of Massachusetts, Amherst
(9111644)

10:00 a.m.
The dual Lie bialgebra of a Lie bialgebra.
Walter J. Michaelis*, University of New Orleans
(91120131)

10:30 a.m.
Integrally closed Galois extensions.
Robert G. Underwood*, Auburn University, Montgomery
(9111368)

Saturday April 20, 1996, 8:30 a.m.10:50 a.m.
Special Session on Fixed Point Theory and Dynamical Systems, II
Room 127, A. P. Tureaud Building Organizers: Michael R. Kelly, Loyola University

8:30 a.m.
The topological theory of roots.
Robert F. Brown*, University of California, Los Angeles
(9115570)

9:00 a.m.
Fixed points of boundarypreserving maps of punctured surfaces.
Jeanine Kay Nolan*, University of Nevada, Reno
(91155221)

9:30 a.m.
Fixed point theory for homogenous spaces.
Peter N. Wong*, Bates College
(91155195)

10:00 a.m.
Periodic points on solvmanifolds.
Edward C. Keppelmann*, University of Nevada, Reno
(91155215)

10:30 a.m.
Jezierski's relative fixed point index and the location of fixed points.
Chi Wah Ng*, CTS, San Diego, California
(91155169)

Saturday April 20, 1996, 9:00 a.m.10:50 a.m.
Special Session on Rings and Modules, II
Room 206, A. P. Tureaud Building Organizers: Ellen E. Kirkman, Wake Forest University
Dan Zacharia, Syracuse University

9:00 a.m.
Low dimensional cohomology and the Euler charactersitic.
Michael J. Bardzell*, Virginia Polytechnic Institute and State University
(91116191)

9:30 a.m.
Quivers and matrix equations.
William H. Gustafson*, Texas Tech University
(91116154)

10:00 a.m.
The representation type of a stable module category.
Henning Krause*, University of Bielefeld, Germany
(9111665)

10:30 a.m.
Wild hereditary algebras.
Otto Kerner*, University of Dusseldorf, Germany
(91116156)

Saturday April 20, 1996, 9:00 a.m.10:50 a.m.
Special Session on Real Analytic Geometry and oMinimal Structures, II
Room 120, A. P. Tureaud Building Organizers: Chris Miller, University of Illinois, Chicago
Lou P. van den Dries, University of Illinois, UrbanaChampaign

9:00 a.m.
Periodic points of definably continuous functions on dense $o$minimal structures.
Chienning Yeh*, University of Wisconsin, Madison
(91103189)

9:30 a.m.
Definably simple groups over $o$minimal structures.
Anand Pillay*, University of Notre Dame
(91103170)

10:00 a.m.
A growth dichotomy for $o$minimal expansions of ordered groups.
Chris Miller, University of Illinois, UrbanaChampaign
Sergei Starchenko*, Vanderbilt University
(91103120)

10:30 a.m.
Real spectrum for $o$minimal structures.
Michel Coste*, University of Rennes I, France
(9111480)

Saturday April 20, 1996, 9:00 a.m.10:55 a.m.
Session on Analysis and Applications
Room 211, A. P. Tureaud Building

9:00 a.m.
Some comments on the support of the Weyl functional calculus.
Bernd Straub*, The University of New South Wales, Australia
(91199270)

9:15 a.m.
$CEP$ approximations for the normal distribution.
Jack Tomsky*, Lockheed Martin Missiles & Space Company, Palo Alto, California
John H. Shoults, Lockheed Martin Missiles & Space Company, Palo Alto, California
Joe M. Stampher, Lockheed Martin Missiles & Space Company, Palo Alto, California
(9116009)

9:30 a.m.
Transformations of index set for Skorokhod integral with respect to Gaussian processes.
Leszek Gawarecki*, General Motors Engineering and Management Institute, Flint, Michigan
(9116051)

9:45 a.m.
Positive solutions to a competitive system with nonlogistic growth rates.
Roger W. Logan*, College of Charleston
(9113553)

10:00 a.m.
On HeleShaw models with surface tension.
Gieri Simonett*, Vanderbilt University
Joachim Escher, University of Basel, Switzerland
(9113554)

10:15 a.m.
Quenching in infinite time on the $N$dimensional ball.
Chiu Yeung Chan, University of Southwestern Louisiana
HonHung T. Liu*, University of Southwestern Louisiana
(91135213)

10:30 a.m.
$LQR$ problems governed by the linear elastostatic equation on Lipschitz domains with point observations.
Zhonghai Ding*, University of Nevada
(9114972)

10:45 a.m.
Perturbations of nonautonomous, abstract Cauchy problems.
Michael Jung*, Technical University of Berlin, Germany
(9114669)

Saturday April 20, 1996, 11:10 a.m.12:00 p.m.
Invited Address
Limit theorems for timevarying queues.
Room E130, HoweRussell Geoscience Complex Building
William A. Massey*, AT&T Research, Murray Hill, New Jersey
(9116004)

Saturday April 20, 1996, 1:10 p.m.2:00 p.m.
Invited Address
Computational algebra and finite dimensional modules.
Room E130, HoweRussell Geoscience Complex Building
Edward L. Green*, Virginia Polytechnic Institute and State University
(9111603)

Saturday April 20, 1996, 2:15 p.m.6:05 p.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, V
Room 120, A. P. Tureaud Building Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

2:15 p.m.
Localglobal principles over real function fields.
Claus Scheiderer*, University of Regensburg, Germany
(91114109)

2:45 p.m.
Pr\"ufer extensions.
Manfred Knebusch*, University of Regensburg, Germany
Digen Zhang, University of Regensburg, Germany
(9111415)

3:15 p.m.
Noetherian space of abstract locally Nash sets.
Ronan Quarez*, University of Rennes 1, France
(91114129)

3:45 p.m.
Epimorphism of reduced partially ordered rings.
Niels C. Schwartz*, University of Passau, Germany
(9111499)

4:15 p.m.
Algebraic moduli of real algebraic curves.
Johannes Huisman*, University of Rennes I, France
(9111496)

4:45 p.m.
Radial vector fields and Poincar\'eHopf theorem.
JeanPaul Brasselet*, CIRM  Luminy, France
(91114148)

5:15 p.m.
Work of L. Noirel on semialgebraic realizations of compact abstract stratified sets.
David J.A. Trotman*, University of Provence, France
(91114203)

5:45 p.m.
Holomorphic rank two vector bundles on blowups.
Elizabeth Terezinha Gasparim*, CINVESTAV del IPN, Mexico
(9111479)

Saturday April 20, 1996, 2:15 p.m.4:35 p.m.
Special Session on LowDimensional Topology, III
Room 124, A. P. Tureaud Building Organizers: Patrick M. Gilmer, Louisiana State University
Rick Litherland, Louisiana State University
Neal W. Stoltzfus, Louisiana State University

2:15 p.m.
Symmetries of the Chern manifold.
Slawomir Kwasik*, Tulane University
Reinhard E. Schultz, Purdue University, West Lafayette
(91157266)

2:45 p.m.
Lissajous knots, billiard knots and their symmetry.
Jozef H. Przytycki*, George Washington University
(9115778)

3:15 p.m.
The asymptotic density of alternating links.
Morwen B. Thistlethwaite*, University of Tennessee, Knoxville
(91157105)

3:45 p.m.
Braided chord diagrams.
Joan S. Birman, Columbia University
Rolland J. Trapp*, California State University, San Bernardino
(91157108)

4:15 p.m.
Arrangements of complex hyperplanes and representations of braid groups.
Daniel C. Cohen, Louisiana State University, Baton Rouge
Alexandru I. Suciu*, Northeastern University
(91120227)

Saturday April 20, 1996, 2:15 p.m.5:35 p.m.
Special Session on Number Theory and Quadratic Forms, III
Room 203, A. P. Tureaud Building Organizers: Jurgen Hurrelbrink, Louisiana State University
Jorge F. Morales, Louisiana State University
Robert V. Perlis, Louisiana State University
Paul B. Van Wamelen, Louisiana State University

2:15 p.m.
Bihomogenous nullstellensatz for $p$fields.
Martin Kruskemper*, University of Munster, Germany
(9111107)

2:45 p.m.
On trace forms of Galois extensions.
Martin Epkenhans*, University of Paderborn, Germany
(9111232)

3:15 p.m.
Quadratic form invariants and the minors of a matrix.
David W. Lewis*, University College of Dublin, Republic of Ireland
(9111111)

3:45 p.m.
Hasse invariant of the trace form.
A. Queguiner*, University of FrancheComte, France
(9111134)

4:15 p.m.
The space of composition algebras.
Daniel B. Shapiro*, Ohio State University, Columbus
(9111161)

4:45 p.m.
Excellent algebraic groups.
Ina Kersten*, University of Bielefeld, Germany
(91111243)

5:15 p.m.
Anisotropic splitting of reductive groups.
Ulf Rehmann*, University of Bielefeld, Germany
(91111242)

Saturday April 20, 1996, 2:15 p.m.4:35 p.m.
Special Session on Stochastic Analysis and Its Applications, III
Room 105, A. P. Tureaud Building Organizers: HuiHsiung Kuo, Louisiana State University
Ambar Niel Sengupta, Louisiana State University

2:15 p.m.
White noise approach to quantum stochastic processes.
Nobuaki Obata*, Nagoya University, Japan
(9116048)

2:45 p.m.
Characterization of the optimal filter: The non Markov case.
Abhay G. Bhatt, Indian Statistical Institute, India
Rajeeva Karandikar*, Indian Statistical Institute, India
(9116067)

3:15 p.m.
Complex HidaWiener distributions.
David E. Betounes*, University of Southern Mississippi
(91160142)

3:45 p.m.
New classes of white noise generalized functions.
W. George Cochran*, Louisiana State University, Baton Rouge
HuiHsiung Kuo, Louisiana State University, Baton Rouge
Ambar Niel Sengupta, Louisiana State University, Baton Rouge
(91160229)

4:15 p.m.
Stochastic Volterra equations with singular kernels.
W. George Cochran, Louisiana State University, Baton Rouge
JungSoon Kim Lee*, Southern University
Jurgen K. Potthoff, University of Mannheim, Germany
(91160222)

Saturday April 20, 1996, 2:15 p.m.5:35 p.m.
Special Session on Transform Theory and Evolution Equations
Room 104, A. P. Tureaud Building Organizers: Frank Neubrander, Louisiana State University
Lutz Weis, Louisiana State University

2:15 p.m.
Transform methods for evolutionary integral equations.
Jan Pruss*, MLU HalleWittenberg, Germany
(91147182)

2:45 p.m.
Some new results in the theory linear elliptic and parabolic equations.
Yuliy A. Semenov*, University of Toronto
(9113546)

3:15 p.m.
The spectrum of the kinematic dynamo operator for an ideally conducting fluid.
Carmen C. Chicone, University of Missouri, Columbia
Yuri D. Latushkin*, University of Missouri, Columbia
Stephen John MontgomerySmith, University of Missouri, Columbia
(9114614)

3:45 p.m.
On Besicovitch almostperiodic generalized functions and applications to evolution equations.
Ioana Cioranescu*, University of Puerto Rico, Rio Piedras
(91147172)

4:15 p.m.
On stabilty and almost periodicity of solutions of evolution equations in Banach spaces.
QuocPhong Vu*, Ohio University, Athens
(91147111)

4:45 p.m.
Abstract Cauchy problems with rapidly growing fundamental solutions.
Peer C. Kunstmann*, University of Kiel, Germany
(91147102)

5:15 p.m.
The Stieltjes transform for vector valued functions.
Humberto E. Prado*, University of Santiago, Chile
Carlos Lizama, University of Santiago, Chile
(9114743)

Saturday April 20, 1996, 2:15 p.m.4:35 p.m.
Special Session on Rings and Modules, III
Room 206, A. P. Tureaud Building Organizers: Ellen E. Kirkman, Wake Forest University
Dan Zacharia, Syracuse University

2:15 p.m.
Homological dimensions of semigroup rings.
James J. Kuzmanovich*, Wake Forest University
(91116151)

2:45 p.m.
Structures of prime ideals in birational extensions over $Z[x]$.
Aihua Li*, Loyola University
Sylvia Margaret Wiegand, University of Nebraska
(9111393)

3:15 p.m.
Strongly simply connected algebras.
Ibrahim Assem, University of Sherbrooke
Shiping Liu*, University of Sherbrooke
(91116202)

3:45 p.m.
Some Koszul algebras.
James Jian Zhang*, University of Washington
(9111685)

4:15 p.m.
Bounded Picard groups.
Gene D. Abrams, University of Colorado, Boulder
Jeremy A. Haefner*, University of Colorado, Boulder
(91116164)

Saturday April 20, 1996, 2:15 p.m.5:35 p.m.
Special Session on Geometric Group Theory, III
Room 125, A. P. Tureaud Building Organizers: Stephen G. Brick, University of South Alabama
Jon M. Corson, University of Alabama
Barry S. Spieler, BirminghamSouthern College

2:15 p.m.
Tame combings of groups.
Michael L. Mihalik*, Vanderbilt University
(91120165)

2:45 p.m.
Kernels of actions on nonpositively curved spaces.
Robert Bieri, University of Frankfurt, Germany
Ross Geoghegan*, State University of New York, Binghamton
(9112087)

3:15 p.m.
An algebraic annulus theorem.
Peter Scott*, University of Michigan, Ann Arbor
G. A. Swarup, University of Melbourne, Australia
(91120246)

3:45 p.m.
Test elements, primitivity and automorphisms.
Benjamin Fine, Fairfield University
Gerhard Rosenberger*, University of Dortmund, Germany
(91120157)

4:15 p.m.
Generalized small cancellation theory.
Guenther P. Huck*, Northern Arizona University
Stephan Rosebrock, Kelkheim, Germany
(91120223)

4:45 p.m.
Type $K$ equations over torsionfree groups.
Andrew P. Clifford*, University of Wisconsin, Parkside
(91120233)

5:15 p.m.
Geometric realization of algebraic $2$complexes after stabilization.
M. Paul Latiolais*, Portland State University
Wolfgang Metzler, Johann Wolfgang Goethe University, Germany
(91157217)

Saturday April 20, 1996, 2:15 p.m.5:05 p.m.
Special Session on Representations of Finite Groups, Algebraic Groups, and Lie Algebras, III
Room 205, A. P. Tureaud Building Organizers: Cornelius Pillen, University of South Alabama
Randall R. Holmes, Auburn University, Auburn

2:15 p.m.
New developments in coherent tensor operators.
Dan Flath*, University of South Alabama
(91120192)

2:45 p.m.
Symplectic and orthogonal Schur algebras.
Stephen R. Doty*, Loyola University of Chicago
(9112092)

3:15 p.m.
The submodules of Weyl modules and $Ext^1$ for quantum groups at roots of $1$.
Leonid Krop*, DePaul University
(9112281)

3:45 p.m.
Good filtrations for representations related to Cartan type Lie algebras.
Zongzhu Lin*, Kansas State University
Daniel Ken Nakano, Utah State University
(9111782)

4:15 p.m.
Extensions of module over Lie algebras of Cartan type.
Zongzhu Lin, Kansas State University
Daniel Ken Nakano*, Utah State University
(9111183)

4:45 p.m.
HallLittlewood polynomials and infinite dimensional Lie algebras.
Naihuan Jing*, North Carolina State University
(91117252)

Saturday April 20, 1996, 2:15 p.m.4:05 p.m.
Special Session on Fixed Point Theory and Dynamical Systems, III
Room 127, A. P. Tureaud Building Organizers: Michael R. Kelly, Loyola University

2:15 p.m.
Rotational entropy.
William Geller, Indiana UniversityPurdue University, Indianapolis
Michal Misiurewicz*, Indiana UniversityPurdue University, Indianapolis
(91154214)

2:45 p.m.
Periodic points, symbolic dynamics and stability in piecewise isometries.
Arek Jozef Goetz*, University of Illinois, Chicago
(91155144)

3:15 p.m.
The geometry of minimal sets in the circle and the torus.
Alec Norton*, University of Texas, Austin
(91158245)

3:45 p.m.
Maximal entropy even orbit types.
William Geller*, Indiana UniversityPurdue University, Indianapolis
Zhenhua Zhang, Tufts University
(91158261)

Saturday April 20, 1996, 2:15 p.m.6:00 p.m.
Special Session on Asymptotic Behavior of Difference Equations with Applications, III
Room 109, A. P. Tureaud Building Organizers: Saber N. Elaydi, Trinity University, San Antonio
Vlajko Lj Kocic, Xavier University of Louisiana

2:15 p.m.
Approximate first integrals for discrete Hamiltonian systems.
Calvin D. Ahlbrandt*, University of Missouri, Columbia
Carmen C. Chicone, University of Missouri, Columbia
Don Steiger, University of Missouri, Columbia
Stephen L. Clark, University of Missouri, Rolla
William T. Patula, Southern Illinois University, Carbondale
(91149200)

2:45 p.m.
Backwards reduction of order theorem.
Allan C. Peterson*, University of Nebraska, Lincoln
(91139181)

3:15 p.m.
On the manifold of convergent solutions of difference equations.
R. Medina*, Universidad de los Lagos, Chile
Manuel Pinto, Universidad de Chile, Chile
(91139179)

3:45 p.m.
Asymptotic formulas for the solutions of difference systems.
Manuel Pinto*, University of Chile, Chile
(91139178)

4:15 p.m.
Convergence of largescale Markovian iterative processes.
Gangaram S. Ladde*, University of Texas, Arlington
(91193185)

4:45 p.m.
Asymptotic behavior of some integrodifference models for plant dispersal, competition and control.
Edward J. Allen*, Texas Tech University
Linda S. Allen, Texas Tech University
Xiaoning Li Gilliam, Texas Tech University
Sudassana Ponweera, Texas Tech University
(91139177)

5:15 p.m.
Open problems discussion

Saturday April 20, 1996, 2:15 p.m.4:25 p.m.
Session on Algebra and Topology
Room 211, A. P. Tureaud Building

2:15 p.m.
DoiHopf data, functors: Applications {\rm I}.
Borong Zhou*, State University of New York, Buffalo
(91116263)

2:30 p.m.
Maximality, primality, and minimality in rings with involution.
Gary F. Birkenmeier*, University of Southwestern Louisiana
Henry E. Heatherly, University of Southwestern Louisiana
Nico Groenewald, University of Port Elizabeth, Republic of South Africa
(9111635)

2:45 p.m.
Algebras generated by endomorphisms on groups.
Henry E. Heatherly*, University of Southwestern Louisiana
Gary Bikenmeier, University of Southwestern Louisiana
Gunter Pilz, Johannes Kepler University, Austria
(9111608)

3:00 p.m.
The $\rho$rational completion of a ring.
Sindhu S. Unnithan*, Xavier University
(91116188)

3:15 p.m.
On the representations of the $ax+b$ group defined over $Z_n$.
Steve Ligh, Southeastern Louisiana University
Edgar N. Reyes*, Southeastern Louisiana University
(9112041)

3:30 p.m.
Dimension and fundamental groups of asymptotic cones.
Jose Burillo*, University of Utah
(9112052)

3:45 p.m.
Cancellation in uniquely divisible topological semigroups.
Kirk B. Benningfield*, University of Houston
(91122219)

4:00 p.m.
A further extension of the loop theorem and resolutions of generalized $3$manifolds with $1$dimensional singular sets.
Thomas L. Thickstun*, Southwest Texas State University
(9115706)

4:15 p.m.
Variations on the pass move in knot theory.
Fred Hickling*, University of Central Arkansas
(91157226)
Sunday April 21, 1996

Sunday April 21, 1996, 8:00 a.m.12:00 p.m.
Meeting Registration
Atrium, HoweRussell Geoscience Complex Building

Sunday April 21, 1996, 8:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations
Room 104, A. P. Tureaud Building Organizers: James R. Dorroh, Louisiana State University
Gisele Ruiz Goldstein, Louisiana State University

8:00 a.m.
On wave motions in moving penetrable media.
Gary Francis Roach*, University of Strathclyde, United Kingdom
(9113524)

8:30 a.m.
The Neumann Laplacian on generalized ridged domains.
David E. Edmunds, University of Sussex, United Kingdom
Robert M. Kauffman*, University of Alabama, Birmingham
(91135171)

9:00 a.m.
Nonquenching, quenching and beyond quenching for degenerate semilinear parabolic equations.
Chiu Yeung Chan*, University of Southwestern Louisiana
Pui Kan Catherine Kong, CarsonNewman College
(9113556)

9:30 a.m.
Regular and singular solutions of a nonlinear Keldysh equation.
Suncica Canic, Iowa State University
Barbara L. Keyfitz*, University of Houston
(9113516)

10:00 a.m.
Sobolev gradients and boundary conditions for systems of nonlinear partial differential equations.
J. W. Neuberger*, University of North Texas
(9113574)

10:30 a.m.
Recent results for semipositone problems.
Ratnasingham Shivaji*, Mississippi State University
(91135149)

Sunday April 21, 1996, 8:00 a.m.10:50 a.m.
Special Session on Number Theory and Quadratic Forms, IV
Room 203, A. P. Tureaud Building Organizers: Jurgen Hurrelbrink, Louisiana State University
Jorge F. Morales, Louisiana State University
Robert V. Perlis, Louisiana State University
Paul B. Van Wamelen, Louisiana State University

8:00 a.m.
The Galois number.
Patricia Wright Beaulieu, University of Southwestern Louisiana
Thomas Palfrey*, Xavier University
(91111237)

8:30 a.m.
Annihilators of scaled trace forms.
Patricia Wright Beaulieu*, University of Southwestern Louisiana
Robert V. Perlis, Louisiana State University, Baton Rouge
(9111149)

9:00 a.m.
A partial generalized of Kaplan's theorem.
Stella Roberson Ashford*, Southern University
(91111235)

9:30 a.m.
On the preservation of root numbers and behavior of Weil characters under reciprocity equivalence.
Jenna Price Carpenter*, Louisiana Tech University
(9111147)

10:00 a.m.
Splitting numbers and multiplicity.
Donna J. Stuart*, Southern University
(91111236)

10:30 a.m.
A relationship between twin primes and their indices.
Ali R. Fazely*, Southern University
(91111238)

Sunday April 21, 1996, 8:00 a.m.10:50 a.m.
Special Session on Asymptotic Behavior of Difference Equations with Applications, IV
Room 109, A. P. Tureaud Building Organizers: Saber N. Elaydi, Trinity University, San Antonio
Vlajko Lj Kocic, Xavier University of Louisiana

8:00 a.m.
A periodically  forced system with application to population dynamics.
Shandelle M. Henson*, University of Arizona
(91139167)

8:30 a.m.
WKB and turning point theory for $2$nd order difference equations with applications.
Jeffrey S. Geronimo*, Georgia Institute of Technology
(91130264)

9:00 a.m.
Dynamic systems on time scales and superlinear convergence.
A. S. Vatsala*, University of Southwestern Louisiana
(91134147)

9:30 a.m.
On the boundedness of the orbit of the gingerbreadman map.
Elias Camouzis*, University of Rhode Island
Richard C. DeVault, University of Rhode Island
Gerasimos Ladas, University of Rhode Island
(91139134)

10:00 a.m.
On difference equations with nonhyperbolic equilibria.
George K. Tzanetopoulos*, University of Rhode Island
(9113962)

10:30 a.m.
Stability and summability of the zero solution of Volterra systems of difference equations.
Youssef N. Raffoul*, Southern Illinois University, Carbondale
(91139183)

Sunday April 21, 1996, 8:30 a.m.10:50 a.m.
Special Session on Real Algebraic Geometry and Ordered Algebraic Structures, VI
Room 120, A. P. Tureaud Building Organizers: Charles N. Delzell, Louisiana State University
James Joseph Madden, Louisiana State University
Scott Woodward, Southern University

8:30 a.m.
Elliptic curves and level of quartics.
Louis Mahe*, University of Rennes I, France
(91114136)

9:00 a.m.
About the image of the signature map in the two dimensional case.
JeanPhilippe Monnier*, University of Rennes 1, France
(91114121)

9:30 a.m.
Exponentiation in power series fields.
Salma Kuhlmann*, University of Heidelberg, Germany
Franz Viktor Kuhlmann, University of Heidelberg, Germany
Saharon Shelah, Hebrew University of Jerusalem, Israel
(91112124)

10:00 a.m.
Old and new constructions of Hilbert identities.
Bruce A. Reznick*, University of Illinois, UrbanaChampaign
(91111114)

10:30 a.m.
A complex version of the BaerKrull theorems.
Gregory W. Brumfiel, Stanford University
Maria Jesus de la Puente*, Universidad Complutense, Spain
(9111213)

Sunday April 21, 1996, 8:30 a.m.10:50 a.m.
Special Session on LowDimensional Topology, IV
Room 124, A. P. Tureaud Building Organizers: Patrick M. Gilmer, Louisiana State University
Rick Litherland, Louisiana State University
Neal W. Stoltzfus, Louisiana State University

8:30 a.m.
Lower central series of finitelypresented $3$manifold groups.
Tim D. Cochran*, Rice University
Kent Orr, Indiana University, Bloomington
(91157101)

9:00 a.m.
Genus two positive Heegaard diagrams.
John P. Hempel*, Rice University
(9115790)

9:30 a.m.
Bounding the number of boundary components of an essential surface in a knot exterior.
John Edwin Luecke*, University of Texas, Austin
(91157207)

10:00 a.m.
A combinatorial Cartan theorem.
Jon M. Corson, University of Alabama, Tuscaloosa
Bruce S. Trace*, University of Alabama, Tuscaloosa
(91157100)

10:30 a.m.
Tangle analysis of DNA Int recombination.
De Witt L Sumners*, Florida State University
(91157106)

Sunday April 21, 1996, 8:30 a.m.10:50 a.m.
Special Session on Geometric Group Theory, IV
Room 125, A. P. Tureaud Building Organizers: Stephen G. Brick, University of South Alabama
Jon M. Corson, University of Alabama
Barry S. Spieler, BirminghamSouthern College

8:30 a.m.
Artin groups, rewriting systems, and three manifolds.
Susan M. Hermiller*, New Mexico State University, Las Cruces
John E. Meier, Lafayette College
(91120196)

9:00 a.m.
Finiteness conditions and abelian quotients of graph groups.
John E. Meier*, Lafayette College
Leonard A. VanWyk, Hope College
(91120231)

9:30 a.m.
Boundaries of $G\times H$ CAT $(0)$ groups.
Kim E. Ruane*, Florida State University
(91120247)

10:00 a.m.
Generating functions for finite group actions on surfaces.
Colin Maclachlan, University of Aberdeen, United Kingdom
Andy Miller*, University of Oklahoma
(91120248)

10:30 a.m.
Higher order Dehn functions of groups.
Juan M. Alonso, Stockholm University, Sweden
William Aubrey Bogley*, Oregon State University
Robert M. Burton, Jr., Oregon State University
Stephen J. Pride, University of Glasgow, United Kingdom
X. Wang, University of Glasgow, United Kingdom
(91120163)

Sunday April 21, 1996, 8:30 a.m.10:50 a.m.
Special Session on Representations of Finite Groups, Algebraic Groups, and Lie Algebras, IV
Room 205, A. P. Tureaud Building Organizers: Cornelius Pillen, University of South Alabama
Randall R. Holmes, Auburn University, Auburn

8:30 a.m.
Cells of HarishChandra modules for real classical groups.
William M. McGovern*, University of Washington
(9111721)

9:00 a.m.
Orbits, invariants and representations associated with a pair of commuting involutions.
Aloysius G. Helminck*, North Carolina State University
Gerald W. Schwarz, Brandeis University
(91120130)

9:30 a.m.
Modules for the dual nil Hecke ring.
Matthew J. Dyer*, University of Notre Dame
(91120107)

10:00 a.m.
Stratifying endomorphism algebras, {\rm I}.
Edward T. Cline*, University of Oklahoma
Brian J. Parshall, University of Virginia
Leonard L. Scott, Jr., University of Virginia
(91116256)

10:30 a.m.
Representations of finite and algebraic groups.
Leonard L. Scott, Jr.*, University of Virginia
(91120208)

Sunday April 21, 1996, 9:00 a.m.10:50 a.m.
Special Session on Rings and Modules, IV
Room 206, A. P. Tureaud Building Organizers: Ellen E. Kirkman, Wake Forest University
Dan Zacharia, Syracuse University

9:00 a.m.
The Yoneda algebra of a selfinjective Koszul algebra.
Roberto Martinez Villa*, University Nacional Autonoma de Mexico, Mexico
(91116187)

9:30 a.m.
A tiled order having large global dimension.
Willem G. Jansen, Compuware Corporation, Farmington Hills, Michigan
Charles J. Odenthal*, University of Toledo
(91116186)

10:00 a.m.
Affine semigroups rings that are complete intersections.
Klaus G. Fischer, George Mason University
Walter D. Morris, George Mason University
Jay A. Shapiro*, George Mason University
(91113112)

10:30 a.m.
Finitistic projective dimension for some algebras.
Birge Zimmermann, University of California, Santa Barbara
Sverre O. Smalo*, University of California, Santa Barbara and The Norwegian University for Science and Technology, Norway
(91119160)

Sunday April 21, 1996, 9:00 a.m.10:50 a.m.
Special Session on Fixed Point Theory and Dynamical Systems, IV
Room 127, A. P. Tureaud Building Organizers: Michael R. Kelly, Loyola University

9:00 a.m.
The $G$sequence of a map and its applications.
Moo Ha Woo*, Korea University, Korea
(91155180)

9:30 a.m.
Relating relative, fibred and absolute Nielsen numbers of fixed and periodic points.
Philip R. Heath*, Memorial University of Newfoundland
(91155128)

10:00 a.m.
Computation of Nielsen numbers for maps of closed surfaces.
Owen Davey, State University of New York, Binghamton
Evelyn L. Hart*, Colgate University
Kathryn A. Trapp, Dartmouth College
(91155141)

10:30 a.m.
Minimal entropy of transitive tree maps.
Stewart Baldwin*, Auburn University, Auburn
(91155150)

Sunday April 21, 1996, 11:10 a.m.12:00 p.m.
Invited Address
Variations on a theme of Picard.
Room E130, HoweRussell Geoscience Complex Building
Fritz Gesztesy*, University of Missouri, Columbia
(9113502)
Inquiries: meet@ams.org

