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
Friday March 12, 1999

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

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

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

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

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

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

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

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

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

8:50 a.m.
Break

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

3:45 p.m.
Break

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Friday March 12, 1999, 5:00 p.m.7:00 p.m.
Department of Mathematics Reception
Keene Faculty Center, Dauer Hall
Inquiries: meet@ams.org