AMS Sectional Meeting Program by Day
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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
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)
Inquiries: meet@ams.org