
AMS Sectional Meeting Full Program
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Program 
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Inquiries: meet@ams.org
1992 Spring Central Section Meeting
Springfield, MO, March 2021, 1992
Meeting #873
Associate secretaries: Andy R Magid, AMS amagid@ou.edu
Friday March 20, 1992

Friday March 20, 1992, 8:00 a.m.10:50 a.m.
Special Session on C*Algebras and Algebraic Topology, I
Room 344, Glass Hall

8:00 a.m.
Exotic index theory and the BaumConnes conjecture for foliations.
Steven Hurder*, University of Illinois, Chicago
(8734645)

8:30 a.m.
Homotopy invariants for operator algebras.
Marius Dadarlat*, University of Maryland, College Park
(8734646)

9:00 a.m.
Bilinear forms in equivariant Ktheory.
Claude Schochet*, University of Maryland, College Park
(8731937)

9:30 a.m.
K theory for padic algebraic groups.
Paul Baum*, Pennsylvania State University, University Park
(8731930)

10:00 a.m.
Operator Ktheory and representations of padic groups.
Roger Plymen*, University of Manchester, England
(8731926)

10:30 a.m.
Index theory on buildings.
Nigel Higson*, Pennsylvania State University, University Park
(87319169)

Friday March 20, 1992, 8:30 a.m.10:50 a.m.
Special Session on Partial Differential Equations, I
Room 227, Glass Hall

8:30 a.m.
Inertial manifolds and almostperiodic reactiondiffusion equations.
Pierre A. Vuillermot*, University of Texas, Arlington
(87335127)

9:00 a.m.
Quenching for degenerate semilinear parabolic equations.
C. Y. Chan*, University of Southwestern Louisiana
P. K. Kong, University of Southwestern Louisiana
(87335159)

9:30 a.m.
Singular solutions of the conformal Scalar curvature equation.
Robert C. McOwen*, Northeastern University
(87335126)

10:00 a.m.
A characterization of criticality for the Schodinger operator.
Z. Zhao*, University of Missouri, Columbia
(87313133)

10:30 a.m.
Informal Discussion

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis, I
Room 262, Glass Hall

9:00 a.m.
A comparison theorem on convergence rates of random walks on groups.
Kenneth A. Ross*, University of Oregon
Daming Xu, University of Oregon
(8736025)

9:30 a.m.
On the entropy norm spaces and the Hardy space ReH^1.
W. Christopher Lang*, Mississippi State University
(8734209)

10:00 a.m.
Brownian motion and thin sets in Vilenkin groups.
D. J. Grubb*, Kansas State University
(8734254)

10:30 a.m.
Existence of a basis in the "big disk algebra" and in some C_cap lambda.
Florence Lancien*, Equipe D'analyses, France
(87342175)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Combinatorics and Discrete Geometry, I
Room 230, Glass Hall

9:00 a.m.
Relations of various conjectures on latin squares and straightening coefficients.
Rosa Q. Huang*, University of Michigan, Ann Arbor
(87305131)

9:30 a.m.
Convexity conjectures concerning Gaussian coefficients.
Kathy M. O'Hara*, University of Iowa
Dennis Stanton, University of Minnesota, Minneapolis
(87305182)

10:00 a.m.
Characteristic polynomials of hyperplane arrangements interpolating between root systems.
Tadeusz J\'ozefiak, Michigan State University
Bruce E. Sagan*, Michigan State University
(8735121)

10:30 a.m.
Connections between fundamental bases of the homology of the partition lattice and the free Lie algebra.
Sheila Sundaram, University of Miami
Michelle L. Wachs*, University of Miami
(87305183)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Commutative Algebra, I
Room 343, Glass Hall

9:00 a.m.
Hilbert rings arising as pullbacks.
David F. Anderson*, University of Tennessee, Knoxville
David E. Dobbs, University of Tennessee, Knoxville
Marco Fontana, Universita di Roma, Italy
(8731332)

9:30 a.m.
Catenarity of formal power series rings over a pullback.
David F. Anderson, University of Tennessee, Knoxville
David E. Dobbs*, University of Tennessee, Knoxville
Marco Fontana, Universita di Roma, Italy
Mohammed Khalis, University of Lyon I, France
(8731336)

10:00 a.m.
The existence of flat covers.
Richard G. Belshoff*, Southwest Missouri State University
Edgar E. Enochs, University of Kentucky
Jinzhong Xu, University of Kentucky
(8731327)

10:30 a.m.
Asymptotic primes and asymptotic grade for modules.
Daniel Katz*, University of Kansas
(87313162)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on The Geometry of Connections, I
Room 342, Glass Hall

9:00 a.m.
The structure of the cutlocus of the boundary for Riemannian surfaces with bounded inradius.
Stephanie B. Alexander, University of Illinois, UrbanaChampaign
Richard L. Bishop*, University of Illinois, UrbanaChampaign
(87353105)

9:30 a.m.
The geometry of connections.
James Carlson*, University of Utah
(87358207)

10:00 a.m.
Particle geometry and quantum electrodynamics.
Andrzej Derdzinski*, Ohio State University, Columbus
(87381120)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Classical Complex Analysis and Related Areas, I
Room 340, Glass Hall

9:00 a.m.
Some cases of the SheilSmall conjecture.
W. H. J. Fuchs*, Cornell University
(87330190)

9:30 a.m.
Value distribution properties for meromorphic functions in the disk.
Linda R. Sons*, Northern Illinois University
(87330167)

10:00 a.m.
Level sets of Bloch functions.
Steffen Rohde*, University of Michigan, Ann Arbor
(87330178)

10:30 a.m.
On Julia sets of polynomials.
A. Hinkkanen*, University of Illinois, UrbanaChampaign
(87330172)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Lie Algebras, Cohomology, and New Applications to Quantum Mechanics, I
Room 237, Glass Hall

9:00 a.m.
Algebraic theory.
Francesco Iachello*, Yale University
(87381148)

9:30 a.m.
On the algebra of tensor operators fo SU(n).
L. C. Biedenharn*, Duke University
(87320160)

10:00 a.m.
Informal Discussion

10:30 a.m.
Lie algebras, quantization, and deformations.
Palle E. T. Jorgensen*, University of Iowa
(8738103)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Semigroups, I
Room 345, Glass Hall

9:00 a.m.
Syntactic semigroups of codes.
H. J\"urgensen*, University of Western Ontario
(87320225)

9:30 a.m.
Dense recognizable languages.
M. Ito*, Kyoto Sangyo University, Japan
M. Katsura, Kyoto Sangyo University, Japan
(8730533)

10:00 a.m.
Inverse semigroup theoretic algorithms for properties of finitely generated subgroups of free groups.
Pascal Weil, University of Paris, France
Stuart W. Margolis*, University of Nebraska, Lincoln
John Meakin, University of Nebraska, Lincoln
Robert Ruyle, University of Nebraska, Lincoln
(8732019)

10:30 a.m.
On the fundamental group of a Lie semigroup.
KarlHermann Neeb*, Technological Hochschule, Germany
(8732053)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Fourier Analysis, I
Room 350, Glass Hall

9:00 a.m.
Measure algebras with polynomial characters.
William C. Connett*, University of Missouri, St.\ Louis
Alan L. Schwartz, University of Missouri, St.\ Louis
(87333226)

9:30 a.m.
Supports and localization of multiple Fourier series.
John F. Price*, Maharishi International University
(8734242)

10:00 a.m.
Characterizations of convergence and Fourier character classes of trigonometric transforms.
David E. Grow*, University of Missouri, Rolla
\v Caslav V. Stanojevi\'c, University of Missouri, Rolla
(87342151)

10:30 a.m.
Harmonic analysis on semisimple Lie groups.
Rebecca A. Herb*, University of Maryland, College Park
(87342152)

Friday March 20, 1992, 9:00 a.m.10:30 a.m.
Special Session on Approximation Theory, I
Room 226, Glass Hall

9:00 a.m.
Shift invariant spaces and approximation.
Carl de Boor, University of Wisconsin, Madison
Ronald A. DeVore*, University of South Carolina, Columbia
Amos Ron, University of Wisconsin, Madison
(87341231)

9:30 a.m.
Wavelet decomposition and shiftvariant spaces.
George Kyriazis*, University of South Carolina, Columbia
(87341230)

10:00 a.m.
The rate of L_papproximation of certain projection operators.
Junjiang Lei*, Oklahoma State University
(87341163)

10:30 a.m.
On the magnitude of Fourier coefficients.
Donald J. Newman, Temple University
Oved Shisha*, University of Rhode Island
(87342212)

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Special Session on Geometry of Affine Space, I
Room 346, Glass Hall

9:00 a.m.
Informal Discussion

9:30 a.m.
Unipotent actions on affine space.
Dennis M. Snow*, University of Notre Dame
(8731472)

10:00 a.m.
Chain rule for multivariable resultants.
Charles ChingAn Cheng, Oakland University
James H. McKay, Oakland University
Stuart SuiSheng Wang*, Oakland University
(87313109)

10:30 a.m.
Informal Discussion

Friday March 20, 1992, 9:00 a.m.10:50 a.m.
Session on Algebra
Room 347, Glass Hall

9:00 a.m.
Unitary amicable pairs to 10^8.
Rudolph M. Najar*, California State University, Fresno
(87311192)

9:20 a.m.
On the index of CohenMacaulay local rings.
S. Ding*, Texas Technical University
(8731316)

9:40 a.m.
On the conjugacy problem for onerelator monoids with finite order elements.
Louxin Zhang*, University of Waterloo
(87320114)

10:00 a.m.
Some remarks on filtrations and plethysms.
Mihalis Maliakas*, University of Arkansas, Fayetteville
(87320144)

10:20 a.m.
Locally distributive rings.
Mary H. Wright*, Southern Illinois University
(87316149)

10:40 a.m.
Unitary **amicable integers.
Dale Woods*, University of Central Oklahoma
(87311143)

Friday March 20, 1992, 11:00 a.m.11:50 a.m.
Invited Address
Quantization of Lie algebra cohomology and quasiexactly solvable Schrodinger operators.
Hutchens Auditorium, Glass Hall
Peter J. Olver*, University of Minnesota, Minneapolis
(8732201)

Friday March 20, 1992, 1:30 p.m.2:20 p.m.
Invited Address
Nilpotent structures on principal bundles.
Hutchens Auditorium, Glass Hall
Ernst A. Ruh*, Ohio State University, Columbus
(8735380)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Harmonic Analysis, II
Room 262, Glass Hall

3:00 p.m.
Sidon sets and quasiBanach spaces.
Nigel Kalton*, University of Missouri, Columbia
(8734389)

3:30 p.m.
Symmetry conditions and operators on TriebelLizorkin spaces.
James E. Daly*, University of Colorado, Colorado Springs
(8734307)

4:00 p.m.
A radial phitransform for radial functions.
Michael Frazier*, Michigan State University
(87341166)

4:30 p.m.
Bounding zeros of H^p functions via concentrations.
Maria Girardi*, University of South Carolina, Columbia
(8733011)

5:00 p.m.
Nonconvolution transforms with oscillating kernels that map B_1^0,1 into itself.
Gary Sampson*, Auburn University, Auburn
(8734202)

5:30 p.m.
The role of hyperfinite sets in analysis.
Nader Vakil*, Western Illinois University
(87342238)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Combinatorics and Discrete Geometry, II
Room 230, Glass Hall

3:00 p.m.
An algebraic characterization of planar graphs.
Dan Archdeacon*, University of Vermont
C. H. C. Little, Massey University, New Zealand
P. Bonnington, University of Waikato, New Zealand
(8730583)

3:30 p.m.
On Hamilton cycles in connected vertex transitive graphs.
Henry H. Glover*, Ohio State University, Columbus
(87305220)

4:00 p.m.
Functions that bound the number of edges in a graph.
Ruth Haas*, Smith College
Michael O. Albertson, Smith College
(87305112)

4:30 p.m.
Embedding graphs in disjunctive products of lines.
Robert E. Jamison*, Clemson University
Selma Strahringer, Technological Hochschule Darmstadt, Germany
(87352221)

5:00 p.m.
Pseudospherical crossing numbers.
Jim Lawrence*, George Mason University
(87305124)

5:30 p.m.
On the average genus of graphs.
Saul Stahl*, University of Kansas
(8730543)

Friday March 20, 1992, 3:00 p.m.6:50 p.m.
Special Session on Partial Differential Equations, II
Room 227, Glass Hall

3:00 p.m.
Hyperbolic systems of conservation laws with umbilic points.
GuiQiang Chen*, University of Chicago
Pui Tak Kan, University of Wisconsin, Madison
(87335194)

3:30 p.m.
Informal Discussion

4:00 p.m.
A priori estimates for solutions to nonlinear elliptic equations.
Wenxiong Chen, Southwest Missouri State University
Congming Li*, Institute for Advanced Study
(87335216)

4:30 p.m.
The existence, uniqueness and regularity of nonlinear partial differential systems.
S. Walter Wei*, University of Oklahoma
(87335132)

5:00 p.m.
Global solutions of Maxwell's equations in an electromagnetic field with the temperaturedependent electrial conductivity.
HongMing Yin*, University of Toronto
(8733504)

5:30 p.m.
Nonstandard finitedifference schemes for PDE's.
Ronald E. Mickens*, Clark Atlanta University
(87365108)

6:00 p.m.
An ellipticparabolic system of degenerate type.
Xiangsheng Xu*, University of Arkansas, Fayetteville
(87335101)

6:30 p.m.
Fundamental solutions of subelliptic differential operators.
ChuanYi Xu*, University of Florida
(87335146)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Commutative Algebra, II
Room 343, Glass Hall

3:00 p.m.
Hilbert coefficients and local cohomology in dimension 2.
Judith D. Sally*, Northwestern University
(8731366)

3:30 p.m.
On graded rings associated to analytic deviation one ideals of small height.
Sam Huckaba*, Florida State University
(8731364)

4:00 p.m.
Resolutions of Gorenstein ideals.
Hema Srinivasan*, University of Missouri, Columbia
(87313119)

4:30 p.m.
Hilbert functions and Betti numbers.
E. Graham Evans, Jr*, University of Illinois, UrbanaChampaign
(87313137)

5:00 p.m.
Passing across linkage.
Susan M. Palmer*, Southwest Missouri State University
(87313102)

5:30 p.m.
Fixed rings of coherent regular rings.
Sarah Glaz*, University of Connecticut, Storrs
(87313128)

Friday March 20, 1992, 3:00 p.m.6:50 p.m.
Special Session on The Geometry of Connections, II
Room 342, Glass Hall

3:00 p.m.
Nonabelian Hodge theory and intersection cohomology.
Kevin Corlette*, University of Chicago
(87357110)

3:30 p.m.
Connection preserving actions of lattices in SL(n,R).
Renato Feres*, University of Chicago
(87358171)

4:00 p.m.
On the local structure of collapsed manifolds.
Patrick Ghanaat*, University of Basel, Switzerland
(87353232)

4:30 p.m.
Rigidity problems for hypersurfaces in complex projective spaces.
Gary R. Jensen*, Washington University
Emilio Musso, Istituo Matematico, Italy
(8735374)

5:00 p.m.
Scalar curvature rigidity.
Maung Minoo*, McMaster University
(8735385)

5:30 p.m.
Metric pinching of locally symmetric spaces.
Conrad Plaut*, Ohio State University, Columbus
(8735879)

Friday March 20, 1992, 3:00 p.m.5:20 p.m.
Special Session on Classical Complex Analysis and Related Areas, II
Room 340, Glass Hall

3:00 p.m.
Extremal problems involving logarithmic and Green capacity.
Richard Laugesen*, Washington University
(87331106)

3:30 p.m.
The boundary absolute continuity of quasiconformal mappings.
Juha Heinonen*, University of Michigan, Ann Arbor
(8733098)

4:00 p.m.
Structural instability of exponential functions.
Zhuan Ye*, Purdue University, West Lafayette
(87330210)

4:30 p.m.
Null sets for doubling and dyadic doubling measures.
JangMei Wu*, University of Illinois, UrbanaChampaign
(87328107)

5:00 p.m.
Some recent results of potential theory.
M. Sodin*, Purdue University, West Lafayette
(87331199)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Lie Algebras, Cohomology and New Applications to Quantum Mechanics, II
Room 237, Glass Hall

3:00 p.m.
Algebraic approaches to molecular electronic structure.
Josef Paldus*, University of Waterloo
(87381228)

3:30 p.m.
Informal Discussion

4:00 p.m.
The Lie algebraic approach to qseries and qdifference equations.
Willard Miller, Jr.*, University of Minnesota, Minneapolis
E. G. Kalnins, University of Waikato, New Zealand
(87333198)

4:30 p.m.
Hidden symmetries of differential equations.
Barbara AbrahamShrauner*, Washington University
(87334193)

5:00 p.m.
Coherent tensor operators.
Dan Flath*, University of South Alabama
(87322168)

5:30 p.m.
About polynomial solutions of differential equations.
A. V. Turbiner*, University de Luminy, France
(87322202)

Friday March 20, 1992, 3:00 p.m.6:50 p.m.
Special Session on C*Algebras and Algebraic Topology, II
Room 344, Glass Hall

3:00 p.m.
A new approach to Bott periodicity.
George A. Elliott, University of Copenhagen, Denmark
Ryszard Nest, University of Copenhagen, Denmark
Toshikazu Natsume*, State University of New York, Buffalo
(87319174)

3:30 p.m.
Power maps and Hodge decomposition in Hochschild and cyclic homology.
Dan Burghelea*, Ohio State University, Columbus
(873461097)

4:00 p.m.
Operator convolution algebras.
Edward G. Effros, University of California, Los Angeles
ZhongJin Ruan*, University of Illinois, UrbanaChampaign
(8734658)

4:30 p.m.
Topological orbit equivalence.
Thierry Giordano, University of Ottawa
Ian Putnam*, University of Victoria
Christian Skau, University of Trondheim, Norway
(8731931)

5:00 p.m.
Cyclic cocycles, index theory on open manifolds and Novikov conjecture for uniformly contractible spaces.
Guoliang Yu*, Mathematical Sciences Research Institute, Berkeley
(8735838)

5:30 p.m.
Hermitian sheaves in operator theory.
Keren Yan*, Indiana UniversityPurdue University, Indianapolis
(87347211)

6:00 p.m.
Quantum Riemann surfaces.
S. Klimek*, Indiana UniversityPurdue University, Indianapolis
(87381197)

6:30 p.m.
"Adiabatic" cobordism theorem for the analytic torsion and the etainvariant.
Krzysztof Wojciechowski*, Indiana UnivPurdue University at Indianapolis
(87357196)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Semigroups, II
Room 345, Glass Hall

3:00 p.m.
The largest proper ideals of certain transformation semigroups.
K. D. Magill, Jr.*, State University of New York, College at Buffalo
(8732015)

3:30 p.m.
Endormorphism monoids of generators in categories of acts.
Ulrich Knauer*, University of Oldenburg, Germany
(87320177)

4:00 p.m.
S_nnormal semigroups.
Robert B. McFadden*, University of Louisville
(87320158)

4:30 p.m.
Description of commutative semigroups in terms of their partial automorphisms.
Boris M. Schein, University of Arkansas, Fayetteville
Shu Zhang*, University of Arkansas, Fayetteville
(87320121)

5:00 p.m.
Green's relations on G_Xnormal semigroups.
Inessa Levi*, University of Louisville
(8732012)

5:30 p.m.
Idempotent endomorphisms in finitedimensional v*algebras.
Andrew Averill*, Maharishi International Univeristy
(8732041)

Friday March 20, 1992, 3:00 p.m.6:20 p.m.
Special Session on Fourier Analysis, II
Room 350, Glass Hall

3:00 p.m.
A characterization and a generalization of continuity.
J. Marshall Ash, DePaul University
Jonathan Cohen*, DePaul University
Christopher Freiling, California State University, San Bernardino
Eric Rieders, DePaul University
(8732671)

3:30 p.m.
Orthonormal trigonometric polynomial bases and the theory of wavelets.
K. I. Oskolkov*, Queen's University
(87342154)

4:00 p.m.
Eigenfunction method of solvability of periodic BVP's for semilinear hyperbolic equations.
P. S. Milojevi\'c*, New Jersey Institute of Technology
(87347153)

4:30 p.m.
Boundedness of maximal operator and some combinatorial estimates.
Bogdan Baishanski*, Ohio State University, Columbus
(87342217)

5:00 p.m.
New elementary transcendental functions and generalzied trigonometric series.
Everett McCoy*, University of Missouri, Rolla
(87342241)

5:30 p.m.
A spectral version of harmonic analysis on R^n.
William O. Bray*, University of Maine
(87342246)

6:00 p.m.
Characterization of Lipschitz spaces via the commutator operator of Coifman, Rochberg, and Weiss.
Maciej Paluszynski, Washington University
Mitchell Taibleson*, Washington University
Guido Weiss, Washington University
(87342247)

Friday March 20, 1992, 3:00 p.m.5:20 p.m.
Special Session on Approximation Theory, II
Room 226, Glass Hall

3:00 p.m.
Exponential decay and resolvents of banded infinite matrices.
Dale T. Smith*, Gadsden, Alabama
(87347155)

3:30 p.m.
Wavelet decompositions via multiresolution.
Carl de Boor, University of Wisconsin, Madison
Ronald A. DeVore, University of South Carolina
Amos Ron*, University of Wisconsin, Madison
(87341239)

4:00 p.m.
L^p properties of multivariate cardinal splines.
W. R. Madych*, University of Connecticut, Storrs
(87341206)

4:30 p.m.
An analytic monotone extension of boundary data.
Xingping Sun, Southwest Missouri State University
Xiangming Yu*, Southwest Missouri State University
(87341240)

5:00 p.m.
Univariant appproximation by superpositions of a sigmoidal function.
Bo Gao, Temple University
Yuan Xu*, University of Arkansas, Little Rock
(87341156)

Friday March 20, 1992, 3:00 p.m.5:50 p.m.
Special Session on Geometry of Affine Space, II
Room 346, Glass Hall

3:00 p.m.
G_alpha actions on C^n and primitive ideals in enveloping algebras of nilpotent Lie algebras.
David R. Finston*, New Mexico State University, Las Cruces
Mai Gehrke, New Mexico State University, Las Cruces
(8731473)

3:30 p.m.
On Jacobian conjecture.
T. T. Moh*, Purdue University, West Lafayette
(8731355)

4:00 p.m.
Homotopy of sections of projective modules.
Satyagopol Mandal*, University of Kansas
(8731368)

4:30 p.m.
On the automorphisms of k[X,Y,Z].
Gene Freudenburg*, Washington University
(8731460)

5:00 p.m.
Informal Discussion

Friday March 20, 1992, 3:00 p.m.4:30 p.m.
Session on Combinatorics, Applications, Geometry and Topology
Room 347, Glass Hall

3:00 p.m.
Counting vetices and edges in Penrose tilings.
Catherine A. Gorini*, Maharishi International University
Robert L. Wofford, Livingston Manor, New York
(8735182)

3:20 p.m.
Dependence systems: Mappings, constructions, congruences.
Marcin Jan Schroeder*, Southern Illinois University
(87306141)

3:40 p.m.
Expansiveness and shift homeomorphisms.
Fred Worth*, Henderson State University
(87354142)

4:00 p.m.
Studies on optimum preventive maintenance policies for general repair result.
Haiyan Gu*, Shanghai University of Technology, China
(8736022)

4:20 p.m.
Semimodules and generalizations of the algebra of binary relations.
Jack M. Anderson*, South Dakota State University
Fan Zhang, South Dakota State University
(87320244)
Saturday March 21, 1992

Saturday March 21, 1992, 8:00 a.m.10:50 a.m.
Special Session on Combinatorics and Discrete Geometry, III
Room 230, Glass Hall

8:00 a.m.
Placing the dcube in Lexicographic order.
Fariba Bigdeli*, Kentucky State University
(87352129)

8:30 a.m.
A combinatorial decomposition of simplicial complexes.
Art Duval*, University of Texas, El Paso
(87305104)

9:00 a.m.
Hshellings and hcomplexes.
Paul H. Edelman*, University of Minnesota, Minneapolis
Victor Reiner, University of Minnesota, Minneapolis
(8730517)

9:30 a.m.
Convex polytopes and stress.
Carl W. Lee*, University of Kentucky
(8735239)

10:00 a.m.
Lemke paths on simple polytopes.
Walter D. Morris, Jr.*, George Mason University
(87390130)

10:30 a.m.
Combinatorial conditions for freeness of modules of piecewise polynomials.
Lauren L. Rose*, Wellesley College
(87305184)

Saturday March 21, 1992, 8:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, III
Room 227, Glass Hall

8:30 a.m.
Uniqueness results for semilinear elliptic equations.
Man Kam Kwong*, Argonne National Laboratory
Yi Li, University of Rochester
(87335229)

9:00 a.m.
The effect of the domain geometry on the number of positive solutions for nonlinear Neumann problems with critical exponents.
ZhiQiang Wang*, Utah State University
(87335214)

9:30 a.m.
Heat flow of Pharmonic maps with values into spheres.
Yunmei Chen*, University of Florida
Minchun Hong, ICTP, Italy
(87335215)

10:00 a.m.
On strongly nonlinear operator equations and applications.
P. S. Milojevic*, New Jersey Institute of Technology
(87335176)

10:30 a.m.
Informal Discussion

Saturday March 21, 1992, 8:00 a.m.10:50 a.m.
Special Session on Commutative Algebra, III
Room 343, Glass Hall

8:00 a.m.
Homological invariants of powers of ideals.
Vijay Kodiyalam*, Purdue University, West Lafayette
(8731381)

8:30 a.m.
Integral uppers over Henselian domains.
Chandni Shah*, University of Texas, Austin
(87313138)

9:00 a.m.
Chern classes of matrices.
Paul C. Roberts*, University of Utah
(8731376)

9:30 a.m.
Chow groups of a regular local ring.
S. P. Dutta*, University of Illinois, UrbanaChampaign
(8731347)

10:00 a.m.
Annihilation of homology of certain finite free complexes.
Cameron Wickham*, Southwest Missouri State University
(87313122)

10:30 a.m.
Structure of a local homomorphism.
Luchezar L. Avramov*, Purdue University, West Lafayette
HansBjorn Foxby, University of Copenhagen, Denmark
Bernd Herzog, Leipzig University, Germany
(87313136)

Saturday March 21, 1992, 8:00 a.m.10:50 a.m.
Special Session on Lie Algebras, Cohomology and New Applications to Quantum Mechanics, III
Room 237, Glass Hall

8:00 a.m.
Asymptotic expansion in momentum of the timedependent Schrodinger equation.
D. J. Kaup*, Clarkson University
(87381205)

8:30 a.m.
Informal Discussion

9:00 a.m.
Representations of quantum algebras and applications.
Luc Vinet*, University of Montreal
(87320243)

9:30 a.m.
Differential operators and trees on algebraic groups.
Robert Grossman*, University of Chicago
(87317236)

10:00 a.m.
Quasiexactly solvable spectral problems and conformal field theory.
Mikhail A. Shifman*, University of Minnesota, Minneapolis
(87381186)

10:30 a.m.
Exact solutions to operator differential equations.
Carl M. Bender*, Washington University
(87381204)

Saturday March 21, 1992, 8:00 a.m.10:50 a.m.
Special Session on C*Algebras and Algebraic Topology, III
Room 344, Glass Hall

8:00 a.m.
DixmierDouady classes of dynamical systems and crossed products.
Iain Raeburn, University of Newcastle, Australia
Dana P. Williams*, Dartmouth College
(8734640)

8:30 a.m.
Unbounded Fredholm modules and automorphisms of C*algebras.
Efton Park*, Indiana UniversityPurdue University, Indianapolis
(8734659)

9:00 a.m.
KK theory and Lie groups.
Jeffrey Fox, State University of New York, Albany and Univeristy of Colorado, Boulder
Peter Haskell*, Virginia Polytechnic Institute and State University
(8734624)

9:30 a.m.
Traces on twisted group C*algebras and cyclic cohomology.
Ronghui Ji*, Indiana UniversityPurdue University, Indianapolis
(8734628)

10:00 a.m.
C*surgery obstructions.
John G. Miller*, Indiana UniversityPurdue University, Indianapolis
(8735896)

10:30 a.m.
Ktheory and homotopy of certain groups and infinite Grassmann spaces associated with C*algebras.
Shuang Zhang*, University of Cincinnati
(8734644)

Saturday March 21, 1992, 8:20 a.m.10:50 a.m.
Special Session on The Geometry of Connections, III
Room 342, Glass Hall

8:20 a.m.
The spectrum of the Laplacian on manifolds of positive curvature.
Jose F. Escobar*, Indiana University, Bloomington
(87353170)

9:00 a.m.
Pointwise curvature characterizations in practice.
Walter Seaman*, University of Iowa
(87353189)

9:40 a.m.
Non selfdual YangMills connections with quadrupole symmetry.
Jan Segert*, University of Missouri, Columbia
Lorenzo Sadun, University of Texas, Austin
(8738175)

10:20 a.m.
The inverse problem of Lagrangian dynamics.
Gerard Thompson*, University of Toledo
(8735863)

Saturday March 21, 1992, 8:30 a.m.10:50 a.m.
Special Session on Classical Complex Analysis and Related Areas, III
Room 340, Glass Hall

8:30 a.m.
Cauchy data for divergence form elliptic equations.
Thomas H. Wolff*, California Institute of Technology
(87335118)

9:00 a.m.
On a conditional theorem of Littlewood for quasiregular entire functions.
John Lewis*, University of Kentucky
(87330147)

9:30 a.m.
On the dimension of the range of a quasiconformal mapping.
Matti Vuorinen*, University of Helsinki, Finland and University of Michigan, Ann Arbor
(87330237)

10:00 a.m.
Distortion of area and conditioned Brownian motion.
P. Griffin, Syracuse University
G. Verchota, Syracuse University
A. Vogel*, Syracuse University
(87330209)

10:30 a.m.
Gap theorems for differentially algebraic functions.
Georg Martin Reinhart*, University of Illinois, UrbanaChampaign
(87330134)

Saturday March 21, 1992, 8:30 a.m.10:50 a.m.
Special Session on Semigroups, III
Room 345, Glass Hall

8:30 a.m.
Congruences on left Clifford semigroup.
KarPing Shum*, Chinese University of Hong Kong, Hong Kong
(87320115)

9:00 a.m.
The congruence extension property for semigroups.
Peter R. Jones*, Marquette University
(8732094)

9:30 a.m.
Semigroups of order 8.
Masamichi Tokizawa*, Chuo University, Japan
(87320123)

10:00 a.m.
On the elementary theories of relatively free semigroups.
Bella V. Rozenblat*, Open University, Israel
(87320140)

10:30 a.m.
Commutative semigroup cohomology.
Pierre A. Grillet*, Tulane University
(8732008)

Saturday March 21, 1992, 9:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis, III
Room 262, Glass Hall

9:00 a.m.
On the duality for the generalized Lorentz spaces.
Sadahiro Saeki*, Kansas State University
(87346165)

9:30 a.m.
Superharmonic functions in Holder domains.
David Stegenga, University of Hawaii
David Ullrich*, Oklahoma State University, Stillwater
(8733151)

10:00 a.m.
A probabilistic proof of Furstenberg's theorem.
Andrew G. Bennett*, Kansas State University
(87360111)

10:30 a.m.
A representation of N_alpha^+ as a union of weighted Hardy spaces.
C. M. Eoff*, University of Arkansas, Fayetteville
(87330191)

Saturday March 21, 1992, 9:00 a.m.10:50 a.m.
Special Session on Approximation Theory, III
Room 226, Glass Hall

9:00 a.m.
Multivariate probabilistic approximation in wavelet structure.
George Anastassiou*, Memphis State University
Xiang Ming Yu, Southwest Missouri State University
(8734106)

9:30 a.m.
Constructive ridge function approximation.
E. W. Cheney*, University of Texas, Austin
W. A. Light, University of Leicester, England
Yuan Xu, University of Arkansas, Little Rock
(8734187)

10:00 a.m.
Good polynomial approximations of functions and their derivatives in L^p[1,1].
Theodore Kilgore*, Auburn University, Auburn
(87341173)

10:30 a.m.
A short proof of Burdzy's theorem on the angular derivative.
Stephen J. Gardiner*, McGill University and Univeristy College, Ireland
(87341235)

Saturday March 21, 1992, 9:00 a.m.10:50 a.m.
Special Session on Geometry of Affine Space, III
Room 346, Glass Hall

9:00 a.m.
Purely inseparable extensions of k[X,Y].
Daniel Daigle*, University of Ottawa
(8731492)

9:30 a.m.
Smooth contractable hypersurfaces in C^n and exotic algebraic structures on C^3.
Shulim Kaliman*, University of Miami
(8731456)

10:00 a.m.
Polynomials with smooth fibers and linear differential operators generated by them.
Yosef Stein*, Center of Technological Education, Israel
(87314113)

10:30 a.m.
Discriminant criterion in characteristic two: Calculations and applications.
Shreeram Abhyankar, Purdue University, West Lafayette
Jun Ou, Purdue University, West Lafayette
Avinash Sathaye*, University of Kentucky
(8731491)

Saturday March 21, 1992, 9:20 a.m.10:10 a.m.
Session on Analysis, I
Room 347, Glass Hall

9:20 a.m.
The spectral radius of layerpotential operators on convex sets in R^n.
Mark Sand*, Northwest Missouri State University
(8733162)

9:40 a.m.
Removable singular set of solutions of variational problems.
Libin Mou*, University of Southern California
(8733586)

10:00 a.m.
Generalizing the contraction condition for nonlinear semigroups.
David Gurney*, Southeastern Louisiana University
(87346145)

Saturday March 21, 1992, 11:00 a.m.11:50 a.m.
Invited Address

Saturday March 21, 1992, 1:30 p.m.2:20 p.m.
Invited Address
Algorithms based on guessing: Infinitely nested priority arguments.
Hutchens Auditorium, Glass Hall
Julia F. Knight*, University of Notre Dame
(87303233)

Saturday March 21, 1992, 3:00 p.m.4:50 p.m.
Special Session on Harmonic Analysis, IV
Room 262, Glass Hall

3:00 p.m.
A remark on singular integrals and power weights.
Fernando Soria, University Autonoma de Madrid, Spain
Guido Weiss*, Washington University
(8734214)

3:30 p.m.
Spheroidal wave functions and hypergroups.
Clemens Markett, RheinischWest Technological University, Germany
William C. Connett*, University of Missouri at St Louis
Alan L. Schwartz, University of Missouri at St Louis
(87333117)

4:30 p.m.
Special atomic decomposition of Besov spaces on fractal sets.
Geraldo De Souza*, Auburn University
Archil Gulisashvili, Georgia Academy of Sciences, USSR
(8734605)

Saturday March 21, 1992, 3:00 p.m.5:20 p.m.
Special Session on Combinatorics and Discrete Geometry, IV
Room 230, Glass Hall

3:00 p.m.
Perfect matchings and perfect squares.
William Jockusch*, Massachusetts Institute of Technology
(8730578)

3:30 p.m.
Combinatorial triality.
Jon Phillips*, Iowa State University
(8730523)

4:00 p.m.
Transversals for polytopes.
N. Prabhu*, Purdue University, West Lafayette
(87305227)

4:30 p.m.
A class of Greedoids derived from matroids.
Mark Purtill*, Institute for Defense Analysis and Communications Research Division, New Jersey
(8730548)

5:00 p.m.
Veldkamp spaces.
Ernest E. Shult*, Kansas State University
(87351157)

Saturday March 21, 1992, 3:00 p.m.6:50 p.m.
Special Session on Partial Differential Equations, IV
Room 227, Glass Hall

3:00 p.m.
Nonexistence of nonparametric minimal submanifolds with prescribed boundary.
Zhiren Jin*, University of Michigan, Ann Arbor
(8733570)

3:30 p.m.
Ricci flow on manifolds with boundary generalized Weyl problem.
Georgi Kamberov*, Rice University
(87353213)

4:00 p.m.
Density condition at infinity and resonance in nonlinear elliptic equations.
M. N. Nkashama*, University of Alabama, Birmingham
(87335180)

4:30 p.m.
Regularity of higherdimensional gauge fields.
Thomas Otway*, Yeshiva University
(87335100)

5:00 p.m.
Finite extinction time for solutions of nonlinear parabolic equations.
Alan V. Lair*, Air Force Institute of Technology
(8733561)

5:30 p.m.
Hyperbolic degeneracy and blowup.
Ralph Saxton*, University of New Orleans
(87335150)

6:00 p.m.
Prescribing Gaussian curvature on surfaces with conical singularities.
Wenxiong Chen*, Southwest Missouri State University
Congming Li, Institute for Advanced Study
(87335161)

6:30 p.m.
A Neumann problem in subdomain of S^2.
Kanghui Guo, Southwest Missouri State University
Shou Chuan Hu*, Southwest Missouri State University
(87335195)

Saturday March 21, 1992, 3:00 p.m.5:50 p.m.
Special Session on Commutative Algebra, IV
Room 343, Glass Hall

3:00 p.m.
Indecomposable CohenMacaulay modules over onedimensional rings.
Roger Wiegand, University of Nebraska, Lincoln
Sylvia Wiegand*, University of Nebraska, Lincoln
(8731388)

3:30 p.m.
Informal Discussion

4:00 p.m.
Purity theorems for schemes of small deviation.
S. D. Cutkosky*, University of Missouri, Columbia
(87313164)

4:30 p.m.
Modules approximated by projectives.
Roger Wiegand*, University of Nebraska, Lincoln
(8731365)

5:00 p.m.
Descent properties.
D. Weston*, University of Missouri, Columbia
(87313242)

5:30 p.m.
Flatness of diagonal Rees algebras.
Gary Kennedy*, Ohio State University, Mansfield
(87313135)

Saturday March 21, 1992, 3:00 p.m.6:10 p.m.
Special Session on The Geometry of Connections, IV
Room 342, Glass Hall

3:00 p.m.
Mean curvature of gauge orbits.
Yohiaki Maeda, Keio University, Japan
Steven Rosenberg, Boston University
Philippe Tondeur*, University of Illinois, UrbanaChampaign
(8735890)

3:30 p.m.
On the structure of complete embedded simply connected minimal surfaces.
Frederico Xavier*, University of Notre Dame
(87353188)

4:00 p.m.
HamiltonJacobi distributions and almost Hermitian geometry on the cotangent bundle.
Geoffrey Martin*, University of Toledo
(8735367)

4:30 p.m.
The functional logdet and the geometry of the space of nonparametrised curves on a surface.
Dan Burghelea*, Ohio State University, Columbus
(87353103)

5:00 p.m.
Holomorphic curves in SO(6)/U(3).
Andrew V. Talmadge*, Arkansas State University
Kichoon Yang, Arkansas State University
(8735369)

Saturday March 21, 1992, 3:00 p.m.4:50 p.m.
Special Session on Classical Complex Analysis and Related Areas, IV
Room 340, Glass Hall

3:00 p.m.
The space BMO and Teichmuller theory.
Michel Zinsmeister*, University of Bordeaux, France and University of Michigan, Ann Arbor
Kari Astala, University of Helsinki, Finland
(87330222)

3:30 p.m.
On the zeros of the derivative of a meromorphic function.
A. Eremenko, Purdue University, West Lafayette
J. Langley, Univeristy of Nottingham, England
J. Rossi*, Virginia Polytech Institute & State University
(87330223)

4:00 p.m.
Circle packings and analytic function theory.
Ken Stephenson*, University of Tennessee, Knoxville
(8733099)

4:30 p.m.
Informal Discussion

Saturday March 21, 1992, 3:00 p.m.4:50 p.m.
Special Session on Lie Algebras, Cohomology and New Applications to Quantum Mechanics, IV
Room 237, Glass Hall

3:00 p.m.
Algebraic approach to scattering.
Y. Alhassid*, Yale University
(87308203)

3:30 p.m.
Scattering theory and the group representation matrix.
Joseph N. Ginocchio*, Los Alamos National Laboratory
(87381179)

4:00 p.m.
Some results regarding loworder Hamiltonian operators.
David B. Cooke*, Hastings College
(87335181)

4:30 p.m.
Embeddings of a Lie algebra into its universal envoloping algebra.
V. Ovsienko*, University de Luminy, France
A. V. Turbiner, University de Luminy, France
(87322200)

Saturday March 21, 1992, 3:00 p.m.6:20 p.m.
Special Session on C*Algebras and Algebraic Topology, IV
Room 344, Glass Hall

3:00 p.m.
Ktheory of C*algebras deformed by actions of R^d.
Marc A. Rieffel*, University of California, Berkeley
(8734610)

3:30 p.m.
Spatial deformation quantization for C*algebras.
Gabriel Nagy*, University of California, Berkeley
(87347187)

4:00 p.m.
The rectifiable metric on the space of projections in a C*algebra.
N. Christopher Phillips*, University of Oregon
(8734649)

4:30 p.m.
CuntzKrieger algebras associated with Fuchsian groups.
Jack Spielberg*, Arizona State University
(87346185)

5:00 p.m.
Primitive ideal spaces of central twisted crossed product C*algebras.
Lawrence Baggett, University of Colorado, Boulder
Judith A. Packer*, University of Colorado, Boulder
(8734629)

5:30 p.m.
Projective C*algebras.
Terry A. Loring*, University of New Mexico
(87346219)

6:00 p.m.
Cohomology for operator algebras.
Frank Gilfeather*, University of New Mexico
Roger R. Smith, Texas A\thsp\&\thsp M University, College Station
(8734757)

Saturday March 21, 1992, 3:00 p.m.5:50 p.m.
Special Session on Semigroups, IV
Room 345, Glass Hall

3:00 p.m.
Quniversal quasivarieties of algebras.
M. E. Adams*, State University of New York, College at New Paltz
W. Dziobiak, N. Copernicus Univeristy, Poland
(8732084)

3:30 p.m.
Semigroup varieties closed for the Bruck extension.
Francis J. Pastijn*, Marquette University
Xiaoying Yan, Marquette University
(8732035)

4:00 p.m.
Varieties of inverse semigroups and strongly unsolvable word problem.
John C. Meakin, University of Nebraska, Lincoln
Mark V. Sapir*, University of Nebraska, Lincoln
(87320139)

4:30 p.m.
Inverse algebras.
Jonathan Leech*, Westmont College
(8732095)

5:00 p.m.
Onerelator orthogroups.
K. S. Ajan*, Marquette University
(8732034)

5:30 p.m.
The height of the set of principal ideals in the semigroup of binary relations.
Mike Breen*, Tennessee Technological University
(8732020)

Saturday March 21, 1992, 3:00 p.m.5:20 p.m.
Special Session on Geometry of Affine Space, IV
Room 346, Glass Hall

3:00 p.m.
Orthogonal and symplectic matrix invariants.
George Seelinger*, Northern Illinois University
(8731493)

3:30 p.m.
Unramified coverings of the affine line in nonzero characteristic.
Shreeram S. Abhyankar*, Purdue University, West Lafayette
(8731413)

4:00 p.m.
On the face problem for automorphisms and birational maps of affine spaces.
Wei Li*, McGill University
Jietai Yu, University of Notre Dame
(8731418)

4:30 p.m.
Powerexact, nilpotent, homogeneous matrices and ten questions about Keller's Jacobian conjecture.
Gary Meisters*, University of Nebraska, Lincoln
Czeslaw Olech, Polish Academy of Sciences, Poland
(87315125)

5:00 p.m.
Rationally triangulable G_a actions.
James K. Deveney*, Virginia Commonwealth University
David Finston, New Mexico State University, Las Cruces
(8731250)

Saturday March 21, 1992, 3:00 p.m.3:50 p.m.
Session on Analysis, II
Room 347, Glass Hall

3:00 p.m.
Boolean lattices of function algebras on rectangular groups in Euclidean spaces.
Hassan Sedaghat*, Virginia Commonwealth University
(8732277)

3:20 p.m.
On the deficiencies of oriented functions.
Arturo Fernandez Arias*, Universidad a Distancia, Spain and University of Wisconsin, Madison
(87331208)

3:40 p.m.
Invariant extensions of holomorphic motions.
Zbigniews Slodkowski*, University of Illinois, Chicago
(87330234)
Inquiries: meet@ams.org

