
AMS Sectional Meeting Program by Day
Current as of Tuesday, April 12, 2005 15:08:56
Program 
Deadlines 
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
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

