AMS Sectional Meeting Full Program
Current as of Tuesday, April 12, 2005 15:09:06
1993 Central Section Meeting
College Station, TX, October 2223, 1993
Meeting #886
Associate secretaries: Andy R Magid, AMS amagid@ou.edu
Friday October 22, 1993

Friday October 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Harmonic Analysis and its Applications, I
Room 510, Rudder Tower

8:30 a.m.
Weighted estimates for operators related to Fourier transforms.
C. CartonLebrun*, Universit\'e de Mors, Belgium
(8864242) 
9:00 a.m.
Weighted Fourier transform inequalities via mixed norm HausdorffYoung inequalities.
Joseph D. Lakey*, University of Texas, Austin
(88642115) 
9:30 a.m.
CalderonZygmund operator theory and Calderontype reproducing formula.
Y.S. Han*, Auburn University, Auburn
(8864292) 
10:00 a.m.
Endpoint estimates for commutators with singular integral operators.
Carlos P\'erez*, University Autonoma de Madrid, Spain
(8864210) 
10:30 a.m.
On the Riesz transforms for Gaussian measures.
Cristian E. Gutierrez*, Temple University, Philadelphia
(8864228)

8:30 a.m.

Friday October 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Reaction Diffusion Systems, I
Room 504, Rudder Tower

8:30 a.m.
An EulerianLagrangian localized adjoint method for reactive transport with biodegradation.
Richard E. Ewing*, Texas A\thsp\&\thsp M University, College Station
Hong Wang, Texas A\thsp\&\thsp M University, College Station
Michael A. Celia, Princeton University
(88635236) 
9:00 a.m.
Threedimensional bioremediation modeling in heterogeneous porous media.
Mary F. Wheeler*, Rice University
(88635194) 
9:30 a.m.
Functional reactiondiffusion equations from climate modeling.
Georg Hetzer*, Auburn University, Auburn
(8863524) 
10:00 a.m.
About global existence for a class of reactiondiffusion systems with balance law.
Michel Pierre*, University of Nancy I, France
(88635108) 
10:30 a.m.
Beyond blowup.
Jerrold W. Bebernes*, University of Colorado, Boulder
(88635151)

8:30 a.m.

Friday October 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Identities and Varieties of Algebraic Structures, I
Room 110, Student Services

8:30 a.m.
On identities of some direct limits of hyperbolic groups.
Alexander Yu Ol$'$shanskii*, Moscow State University, Russia
(88620211) 
9:00 a.m.
Informal Discussion 
9:30 a.m.
Latest on the dimension subgroup problem.
Narain Gupta*, University of Manitoba
(8862073) 
10:00 a.m.
The Burnside problem on periodic groups.
Sergei V. Ivanov*, McGill University
(88620210) 
10:30 a.m.
Residual properties of free groups.
Thomas S. Weigel*, University of Freiburg, Germany
(88620190)

8:30 a.m.

Friday October 22, 1993, 8:30 a.m.10:50 a.m.
Special Session on Algebraic Combinatorics, I
Room 701, Rudder Tower

8:30 a.m.
Orthogonal arrays, covering designs and search designs.
N. J. A. Sloane*, American Tel & Tel Bell Laboratories, Murray Hill, New Jersey
(88605122) 
9:00 a.m.
Orbital schemes of B_3 (q) acting on 2dimensional totally isotropic subspaces.
J. Hemmeter*, Northeast Missouri State University
V. A. Ustimenko, Kiev State University, Ukraine
A. J. Woldar, Villanova University
(88605188) 
9:30 a.m.
Rational functions and association scheme parameters.
Douglas A. Leonard*, Auburn University, Auburn
(8860597) 
10:00 a.m.
Extending Lander's table to nonabelian difference sets.
Ken W. Smith*, Central Michigan University
(8860594) 
10:30 a.m.
5design with three intersection numbers.
Y. J. Ionin, Central Michigan University
M. S. Shrikhande*, Central Michigan University
(8860596)

8:30 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Several Complex Variables, I
Room 707, Rudder Tower

9:00 a.m.
On translations of the images of analytic maps.
Ian Graham*, University of Toronto
Dror Varolin, University of Toronto
(8863267) 
9:30 a.m.
Upper semicontinuity of automorphism groups.
Buma Fridman*, Wichita State University
(88632169) 
10:00 a.m.
Higher order Kobayashi metrics.
Jiye Yu*, Texas A\thsp\&\thsp M University, College Station
(8863268) 
10:30 a.m.
Subelliptic estimates on nonpseudo convex domains.
LopHing Ho*, Wichita State University
(8863237)

9:00 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Composition Operators on Spaces of Analytic Functions, I
Room 401, Rudder Tower

9:00 a.m.
Geometric models and compactness of compostition operators.
Wayne Smith, University of Hawaii, Honolulu
Joel H. Shapiro, Michigan State University
David A. Stegenga*, University of Hawaii, Honolulu
(88630191) 
9:30 a.m.
Unitarily equivalent compact composition operators.
Randall K. CampbellWright*, University of Tampa
(8864734) 
10:00 a.m.
An integral operator on H^2.
Alexandru Aleman, Fern University, Germany
Aristomenis G. Siskakis*, Aristotle University of Thessaloniki, Greece
(88647126) 
10:30 a.m.
Composition operators and other operators on Bergman spaces.
Daniel H. Luecking*, University of Arkansas, Fayetteville
(88646164)

9:00 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, I
Room 502, Rudder Tower

9:00 a.m.
On the determination of potentials without bound state data.
William Rundell*, Texas A\thsp\&\thsp M University, College Station
Paul Sacks, Iowa State University
(88635102) 
9:30 a.m.
Kernel asymptotics of exotic secondorder operators.
Stephen A. Fulling*, Texas A\thsp\&\thsp M University, College Station
(8864785) 
10:00 a.m.
Continuous families with a bounding function.
David Gurney*, Southern Louisiana University
(8863505) 
10:30 a.m.
Finite element solutions for models involving the pLaplacian.
Lew Lefton*, University of New Orleans
Dongming Wei, University of New Orleans
(8863571)

9:00 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Nonselfadjoint Operator Algebras, I
Room 410, Rudder Tower

9:00 a.m.
Cyclic and separating vectors for extensions of operators.
David R. Larson, Texas A\thsp\&\thsp M University, College Station
Warren R. Wogen*, University of North Carolina, Chapel Hill
(8864749) 
9:30 a.m.
When are close CSL algebras similar?
David R. Pitts*, University of Nebraska, Lincoln
(88647242) 
10:00 a.m.
Spectrally bounded generalized inner derivations.
Raul E. Curto*, University of Iowa
(88646147) 
10:30 a.m.
Factorization of positive invertible operators in AF algebras.
Houben Huang, University of Saskachewan
Timothy D. Hudson*, University of Waterloo
(8864678)

9:00 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on Representation Theory and Geometry of Noncommutative Algebras, I
Room 111, Student Services

9:00 a.m.
Differential operators on Toric varieties.
Ian M. Musson*, University of Wisconsin, Milwaukee
(8861664) 
9:30 a.m.
Twisted rings of differential operators over projective rational curves.
David T. Kausch*, University of Michigan, Ann Arbor
(88616181) 
10:00 a.m.
The coradical filtration of quantum enveloping algebras.
William Chin*, DePaul University
Ian M. Musson, University of WisconsinMilwaukee
(8861679) 
10:30 a.m.
On crossed products and invariants of Hopf algebras.
Maria E. Lorenz*, University of Pittsburgh, Pittsburgh
Martin Lorenz, Temple University, Philadelphia
(88616157)

9:00 a.m.

Friday October 22, 1993, 9:00 a.m.10:50 a.m.
Special Session on The Geometry of Banach Spaces and Operator Spaces, I
Room 404, Rudder Tower

9:00 a.m.
Banach spaces for which all subspaces have LUST.
Peter Casazza*, University of Missouri, Columbia
Bernard Maurey, University of Paris VII, France
Nicole TomczakJaegermann, University of Alberta
(88646184) 
9:30 a.m.
Operator ideals and operator spaces.
B. Mathes*, Colby College
V. Paulsen, University of HoustonUniversity Park
(88647251) 
10:00 a.m.
The complete continuity property and finite dimensional decompositions.
Maria Girardi*, University of South Carolina, Columbia
W. B. Johnson, Texas A\thsp\&\thsp M University, College Station
(88646250) 
10:30 a.m.
On some properties of l_ptensor products.
Jeff Farmer*, University of Northern Colorado
A. Arias, University of Texas at San Antonio
(88646256)

9:00 a.m.

Friday October 22, 1993, 11:00 a.m.11:50 a.m.
Invited Address
Hilbertian operator spaces.
Room 601, Rudder Tower
G. Pisier*, Texas A\thsp\&\thsp M University, College Station
(88646216) 
Friday October 22, 1993, 1:30 p.m.2:20 p.m.
Invited Address
Symbolic dynamics, probability, and counting problems in geometry.
Room 601, Rudder Tower
Steven P. Lalley*, Purdue University, West Lafayette
(88654166) 
Friday October 22, 1993, 3:00 p.m.6:20 p.m.
Special Session on Harmonic Analysis and its Applications, II
Room 510, Rudder Tower

3:00 p.m.
Fourier coefficients and sums of squares.
Kathy D. Merrill*, Colorado College
Lynne H. Walling, University of Colorado, Boulder
(8864388) 
3:30 p.m.
On the density of B_h[g] sequences and the minimum of dense cosine sums.
Mihail N. Kolountzakis*, Stanford University
(8861102) 
4:00 p.m.
Pointwise convergence of wavelet expansions.
Susan Kelly, University of Wisconsin, La Crosse
Mark Andrew Kon*, Boston University
Louise Raphael, Howard University
(88642105) 
4:30 p.m.
Absolute continuity of random kAdic expansions.
Anca Deliu*, Georgia Institute of Technology
(88639145) 
5:00 p.m.
Noise reduction by irregular sampling and local frames.
John J. Benedetto*, University of Maryland, College Park
(8864206) 
5:30 p.m.
Affine operators and frames of multivariate wavelets.
Charles K. Chui, Texas A\thsp\&\thsp M University, College Station
Xianliang Shi*, Texas A\thsp\&\thsp M University, College Station
(8864227) 
6:00 p.m.
Bounded imaginary powers of elliptic operators.
Gieri Simonett*, University of California, Los Angeles
Herbert Amann, University of Zurich, Switzerland
Matthias Hieber, University of Zurich, Switzerland
(8864744)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Several Complex Variables, II
Room 707, Rudder Tower

3:00 p.m.
Bergman projection in a smooth nonpseudoconvex domain.
David E. Barrett, University of Michigan, Ann Arbor
John Erik Fornaess, University of Michigan, Ann Arbor
Zaifei Ye*, University of Michigan, Ann Arbor
(88632196) 
3:30 p.m.
Structure of bad biholomorphic maps.
David E. Barrett*, University of Michigan, Ann Arbor
(88632203) 
4:00 p.m.
On the mapping problem for algebraic real hypersurfaces.
Xiaojun Huang*, Washington University
(88632123) 
4:30 p.m.
Embeddings of planar domains.
Berit Stensones*, University of Michigan, Ann Arbor
(88632201) 
5:00 p.m.
Bergman projection of nonpseudoconvex domains.
Peiming Ma*, Purdue University, West Lafayette
(8863298) 
5:30 p.m.
Sobolev regularity of the weighted Bergman projections.
Marco M. Peloso*, Polytechnico of Torino, Italy
(88632103)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Composition Operators on Spaces of Analytic Functions, II
Room 401, Rudder Tower

3:00 p.m.
Nuclearity of composition operators.
Hans Jarchow*, University of Zurich, Switzerland
Reinhard Riedl, University of Zurich, Switzerland
(88647153) 
3:30 p.m.
Composition operators on families of Cauchy transforms.
R. A. Hibschweiler*, University of New Hampshire
(88630111) 
4:00 p.m.
Composition operators on convex domains in C^n.
Peter R. Mercer*, University of North Carolina, Chapel Hill
(88647124) 
4:30 p.m.
On semigroups of composition operators and their cogenerators.
F. Jafari*, University of Wyoming
(88647114) 
5:00 p.m.
Reducing subspaces of composition operators.
James Guyker*, State University of New York, Buffalo
(8865776) 
5:30 p.m.
Spectra of invertible weighted composition operators in spaces of analytic functions.
Arkady Kitover*, Community College of Philadelphia
(88647214)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.4:50 p.m.
Special Session on Partial Differential Equations, II
Room 502, Rudder Tower

3:00 p.m.
The Favard class associated with a degenerate nonlinear parabolic problem.
Gisele Ruiz Goldstein*, Louisiana State University, Baton Rouge
Jerome A. Goldstein, Louisiana State University, Baton Rouge
Shinnosuke Oharu, Louisiana State University, Baton Rouge
(88635116) 
3:30 p.m.
Lie generators for semigroups of transformations on a Polish space.
J. R. Dorroh*, Louisiana State University, Baton Rouge
John W. Neuberger, University of North Texas
(8864704) 
4:00 p.m.
Coefficient recovery in a parabolic equation from input sources.
Bruce Lowe*, Texas A\thsp\&\thsp M University, College Station
William Rundell, Texas A\thsp\&\thsp M University, College Station
(88635155) 
4:30 p.m.
Nontrivial solutions for a superlinear Dirichlet problem.
Alfonso Castro*, University of North Texas
Jorge Cossio, University National de Colombia, Colombia
(88635228)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Control Systems Governed By Partial Differential Equations, I
Room 501, Rudder Tower

3:00 p.m.
Nonstandard Riccati equations with applications to boundary control of damped wave and plate equations.
D. Lukes, University of Virginia
I. Lasiecka*, University of Virginia
L. Pandolfi, Polytechnico of Torino, Italy
(8864983) 
3:30 p.m.
Pseudodifferential methods in regularity analysis for the boundary element method.
Michael Pedersen*, Technical University of Denmark, Copenhagen
(88635134) 
4:00 p.m.
Robustness of multipleinput multipleoutput distributed parameter control systems with respect to delays.
Richard Rebarber*, University of Nebraska, Lincoln
(88693139) 
4:30 p.m.
Linearquadratic boundary control of the potential equation on Lipschitz or polygonal domains.
Zhonghai Ding*, Texas A\thsp\&\thsp M University, College Station
Jianxin Zhou, Texas A\thsp\&\thsp M University, College Station
(88635137) 
5:00 p.m.
Sliding horizon control.
Luther White*, University of Oklahoma
(8869384) 
5:30 p.m.
The maximum principle for distributed parameter control systems.
Hector O. Fattorini*, University of California, Los Angeles
(88649135)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:25 p.m.
Special Session on Texas Geometry and Topology, I
Room 601, Rudder Tower

3:00 p.m.
Algebraic cycles as a topological group functor.
Paulo LimaFilho*, Texas A\thsp\&\thsp M University, College Station
(88614209) 
4:00 p.m.
Spectrum of the number operator on path space.
Terry Lohrenz*, Rice University
(88658245) 
4:40 p.m.
An irreducible homology 3sphere which is not Dehn surgery on a knot.
Dave Auckly*, University of Texas, Austin
(8865751)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Reaction Diffusion Systems, II
Room 504, Rudder Tower

3:00 p.m.
Pattern formation in generalized Turing systems.
H. G. Othmer*, University of Utah
(88635150) 
3:30 p.m.
gammaeigenvalues and the stability of periodic waves.
Robert A. Gardner*, University of Massachusetts, Amherst
(8863523) 
4:00 p.m.
Lattice dynamics.
ShuiNee Chow*, Georgia Institute of Technology
(8863407) 
4:30 p.m.
Fast slow systems and singular index pairs.
Konstantin Mischaikow*, Georgia Institute of Technology
(88634167) 
5:00 p.m.
Periodic solutions of reactiondiffusion systems.
Selwyn Hollis*, Armstrong State College
Jeff Morgan, Texas A\thsp\&\thsp M University, College Station
(88635125) 
5:30 p.m.
Dynamics of competition in the unstirred chemostat.
H. L. Smith*, Arizona State University
P. Waltman, Emory University
S. B. Hsu, National Tsing Hua University, Taiwan
(8863438)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.6:20 p.m.
Special Session on Nonselfadjoint Operator Algebras, II
Room 410, Rudder Tower

3:00 p.m.
Factorability along commutative subspace lattices.
R. L. Moore, University of Alabama, Tuscaloosa
T. T. Trent*, University of Alabama, Tuscaloosa
(8864793) 
3:30 p.m.
Locally constant cocycles on AFalgebras.
Justin R. Peters, III*, Iowa State College, Ames
Allan P. Donsig, Texas A\thsp\&\thsp M University, College Station
(88646156) 
4:00 p.m.
Some results on certain reflexive operator algebras.
Elias G. Katsoulis*, East Carolina University
(88647106) 
4:30 p.m.
Standard Zanalytic TAF algebras and dynamical systems.
YiuTung Poon*, Iowa State College, Ames
(88646159) 
5:00 p.m.
The lattice of ideals of a triangular AF algebra.
Allan P. Donsig*, University of Waterloo
Timothy D. Hudson, University of Waterloo
(8864699) 
5:30 p.m.
Compressions, graphs, and hyperreflexivity.
Don Hadwin*, University of New Hampshire
(88647129) 
6:00 p.m.
Elementary operators and invariant subalgebras.
Keith J. Coates*, Texas A\thsp\&\thsp M University, College Station
(88646225)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.4:50 p.m.
Special Session on Representation Theory and Geometry of Noncommutative Algebras, II
Room 111, Student Services

3:00 p.m.
Minimal prime ideals in the enveloping algebras of Lie superalgebras.
Ellen E. Kirkman*, Wake Forest University
James J. Kuzmanovich, Wake Forest University
(88616160) 
3:30 p.m.
The Shapovalev determinant and simple modules.
Gail Letzter*, Massachusetts Institute of Technology
(8861789) 
4:00 p.m.
Hopf algebra analogues of Lie algebra results.
Miriam Cohen, BenGurion University of the Negev, Israel
Davida Fischman*, University of Southern California
Sara Westreich, Ben Gurion University, Israel
(88616186) 
4:30 p.m.
Zerodimensional symplectic leaves and point modules for quantum n x n matrices.
Michaela Vancliff*, University of Washington
(8861490)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.6:20 p.m.
Special Session on Identities and Varieties of Algebraic Structures, II
Room 110, Student Services

3:00 p.m.
In the shadow of the coproduct functor.
George M. Bergman*, University of California, Berkeley
(8861611) 
3:30 p.m.
Multilinear identities in characteristic p.
Alexander R. Kemer*, Novosibirsk State University, Russia
(88616141) 
4:00 p.m.
New central polynomials for the matrix algebras.
Vesselin Drensky*, Bulgarian Academy of Sciences, Bulgaria
(8861661) 
4:30 p.m.
Polynomial identities of minimal degree of M_n(F),n greater than or equal to 4.
Alain D'Amour, Swarthmore College
Michel L. Racine*, University of Ottawa,
(88616107) 
5:00 p.m.
On minimal*identities of n x n matrices.
Antonino Giambruno*, University di Palermo, Italy
Angela Valenti, University di Palermo, Italy
(8861587) 
5:30 p.m.
A weak polynomial identity and a central polynomial of low degree for 4 X 4 matrices.
Vesselin Drensky, Bulgarian Academy of Sciences, Bulgaria
Giulia Maria Piacentini Cattaneo*, University di Tor Vergata,
(8861560) 
6:00 p.m.
Equivalence of T_2semiprime ideals of the free algebra.
Onofrio M. Di Vincenzo*, University of Messina, Italy
(8861686)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Noncommutative Differential Geometry, I
Room 402, Rudder Tower

3:00 p.m.
Comments concerning noncommutative metrics.
Marc A. Rieffel*, University of California, Berkeley
(8864633) 
3:30 p.m.
Comultiplicative deformation quantizations of the Poisson SU(2) are not leafpreserving.
Albert J.L. Sheu*, University of Kansas
(8864630) 
4:00 p.m.
Excision in Etheory without suspensions.
Marius D\v ad\v arlat, Purdue University, West Lafayette
Terry A. Loring*, University of New Orleans
(8864618) 
4:30 p.m.
On the asymptotic homotopy type of C*algebras.
Marius D\v ad\v arlat*, Purdue University, West Lafayette
(8864608) 
5:00 p.m.
Some connections between hyperbolic dynamics and Fuchsian groups.
Jack Spielberg*, Arizona State University
(8864620) 
5:30 p.m.
Spectral invariant subalgebras of crossed product C* algebras.
Ronghui Ji*, Indiana UnivPurdue University at Indianapolis
Larry Schweitzer, University of Victoria
(88646168)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.6:20 p.m.
Special Session on The Geometry of Banach Spaces and Operator Spaces, II
Room 404, Rudder Tower

3:00 p.m.
Some remarks on operator spaces.
Edward G. Effros*, University of California, Los Angeles
(88646239) 
3:30 p.m.
Pelczynski's property V in continuous function spaces.
Elizabeth M. Bator*, University of North Texas
Paul W. Lewis, University of North Texas
(8864645) 
4:00 p.m.
Informal Discussion 
4:30 p.m.
On the cohomology of inclusions of von Neuman algebras.
Florin Pop*, Texas A\thsp\&\thsp M University, College Station
(88646253) 
5:00 p.m.
We are interested in different subclasses of the Baire1 functions on a Polish space K.
Fouad Chaatit*, University of Texas, El Paso
(88646248) 
5:30 p.m.
Convex block equivalent sequences in Banach spaces.
Haskell Rosenthal*, University of Texas, Austin
(88646112) 
6:00 p.m.
Multianalytic operators on Fock spaces.
Gelo Popescu*, University of Texas, San Antonio
(88646237)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Combinatorics, II
Room 701, Rudder Tower

3:00 p.m.
Graphs which are locally Grassmann.
Richard M. Weiss*, Tufts University
(88620220) 
3:30 p.m.
Cycle ideals for distanceregular graphs.
Aaron D. Meyerowitz*, Florida Atlantic University
(88605221) 
4:00 p.m.
Strongly regular squarefree graphs.
Benjamin V.C. Collins*, University of Wisconsin, Madison
(88605130) 
4:30 p.m.
Spherical designs: Balancing a set of points on the surface of the sphere.
Bela Bajnok*, Getturysburg College
(8860535) 
5:00 p.m.
AskeyWilson polynomials, kernel polynomials and association schemes.
Laura Chihara*, Saint Olaf College
(88605219) 
5:30 p.m.
Antipodal distanceregular graphs of diameter four and five.
Aleksandar Juri\v si\'c*, University of Waterloo,
(88605223)

3:00 p.m.

Friday October 22, 1993, 3:00 p.m.4:45 p.m.
General Session
Room 507 A/B, Rudder Tower

3:00 p.m.
Sylow psubgroups in the BettiMathieu group.
Hong G. Park*, Jeonju University, Korea
(8861203) 
3:15 p.m.
Largest factor of an ergodic action with discrete spectrum.
Edgar N. Reyes*, Southeastern Louisiana University
(8862222) 
3:30 p.m.
On a geometric theory of quasilinear reaction diffusion systems.
Gieri Simonett*, University of California Los Angeles
(8863558) 
3:45 p.m.
Informal Discussion 
4:00 p.m.
Isometries and unconditional bases of sequence spaces.
Beata Randrianantoanina*, University of Missouri, Columbia
(8864650) 
4:15 p.m.
Rtransforms of free joint distributions, and noncrossing partitions.
Alexandru M. Nica*, University of California, Berkeley
(8864657) 
4:30 p.m.
On compactness of composition operators in Hardy spaces of several variables.
SongYing Li, University of California, Irvine
Bernard Russo*, University of California, Irvine
(88647117)

3:00 p.m.
Saturday October 23, 1993

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis and its Applications, III
Room 510, Rudder Tower

8:00 a.m.
Multidimensional irreducible cocycles for an irrational rotation.
Lawrence W. Baggett*, University of Colorado, Boulder
(8862291) 
8:30 a.m.
A Weyl C* algebra for infinite dimensional vector spaces.
Marc A. Rieffel*, University of California, Berkeley
(8864632) 
9:00 a.m.
Transversally elliptic operators on strictly pseudoconvex CR manifolds.
Daryl Geller*, State University of New York, Stony Brook
(8863553) 
9:30 a.m.
Rado's theorem for locally solvable vector fields.
Jorge Hounie*, Universidade Federal de Pernambuco, Brazil
Joaquim Tavares, Universidade Federal de Pernambuco, Brazil
(8863515) 
10:00 a.m.
Asymptotics of oscillatory integrals in R^2 about degenerate critical points.
Peter M. Jarvis*, University of Wisconsin, Madison
(88642200) 
10:30 a.m.
A van der Corput type lemma and its applications.
YiBiao Pan*, University of Pittsburgh, Pittsburgh
(88611217)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Several Complex Variables, III
Room 707, Rudder Tower

8:00 a.m.
Model generic CR submanifolds of bold C^n.
Alexander Nagel*, University of Wisconsin, Madison
(88632182) 
8:30 a.m.
Wavefront sets of CR structures.
G\'abor Francsics*, University of Pennsylvania
(88632243) 
9:00 a.m.
Deformations of imbedded quotients of S^3.
John S. Bland*, University of Toronto,
(88632195) 
9:30 a.m.
Analytic discs and CR functions.
Alexander Tumanov*, University of Illinois, UrbanaChampaign
(88632113) 
10:00 a.m.
Normal forms for graphs in bold C^2.
Gary A. Harris*, Texas Tech University
(88632170) 
10:30 a.m.
Problems on interpolation manifolds.
Yeren Xu*, Temple University, Philadelphia
(88632185)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Reaction Diffusion Systems, III
Room 504, Rudder Tower

8:00 a.m.
Asymptotically autonomous reactiondiffusion systems.
Michael W. Smiley*, Iowa State College, Ames
(8863548) 
8:30 a.m.
A Stefanlike problem arising from the electrical heating of a conductor with conductivity vanishing at finite temperature.
Xiangsheng Xu*, University of Arkansas
(8863543) 
9:00 a.m.
Multispike stationary solutions to the CahnHilliard equation.
Peter W. Bates*, Brigham Young University
Paul Fife, University of Utah
Giorgio Fusco, University of Rome, Italy
(88635149) 
9:30 a.m.
Positive solutions of reaction diffusion equations.
James R. Ward, Jr.*, University of Alabama, Birmingham
(88635109) 
10:00 a.m.
Effects of time delays on certain reaction  diffusion systems.
William Fitzgibbon, University of Houston, Downtown
Mary Parrott*, University of South Florida
Glenn Webb, Vanderbilt University
(8863582) 
10:30 a.m.
A crisscross epidemic model with diffusion and incubation.
W. E. Fitzgibbon, University of HoustonUniversity Park
M. E. Parrott, University of South Florida
G. F. Webb*, Vanderbilt University
(88635171)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Nonselfadjoint Operator Algebras, III
Room 410, Rudder Tower

8:00 a.m.
Order preservation in limit algebras.
Allan Donsig, Texas A\thsp\&\thsp M University, College Station
Alan Hopenwasser*, University of Alabama, Tuscaloosa
(8864759) 
8:30 a.m.
Ideals of continuous nest algebras.
John L. Orr*, University of Nebraska, Lincoln
(88647180) 
9:00 a.m.
Quasidiagonality of direct sums of operators.
Laurent Marcoux*, University of Alberta
Sivaram K. Narayan, Central Michigan University
(88646241) 
9:30 a.m.
Operators and wavelets.
Xingde Dai*, University of North Carolina, Charlotte
David R. Larson, Texas A\thsp\&\thsp M University, College Station
(88647205) 
10:00 a.m.
HilbertSchmidt norm estimates for central completions.
M. Bakonyi, Georgia State University
V. Kaftal*, University of Cincinnati
G. Weiss, University of Cincinnati
H. J. Woerdeman, College of William and Mary
(88647207) 
10:30 a.m.
Operator norm estimates for central completions.
M. Bakonyi, Georgia State University
V. Kaftal, University of Cincinnati
G. Weiss*, University of Cincinnati
H. J. Woerdeman, College of William and Mary
(88647206)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Identities and Varieties of Algebraic Structures, III
Room 110, Student Services

8:00 a.m.
Lattices of varieties.
Ralph McKenzie*, University of California, Berkeley
(88620174) 
8:30 a.m.
Lattices of equational theories.
George McNulty*, University of South Carolina, Columbia
(88608230) 
9:00 a.m.
Finitely presented groups and completely regular semigroups.
K. S. Ajan, Marquette University
F. J. Pastijn*, Marquette University
(8862054) 
9:30 a.m.
The complexity of the word problem in semigroup varieties.
Mark V. Sapir*, University of Nebraska, Lincoln
(88620175) 
10:00 a.m.
Semigroup varieties with almost commuting fully invariant congruences on free objects.
Michael V. Volkov*, Ural State University, Russia
(88620231) 
10:30 a.m.
Existence varieties of regular semigroups.
Peter R. Jones*, Marquette University
(8862055)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on The Geometry of Banach Spaces and Operator Spaces, III
Room 404, Rudder Tower

8:00 a.m.
Banach spaces which admit a norm with the uniform KadecKlee property.
Stephen Dilworth*, University of South Carolina, Columbia
(88646249) 
8:30 a.m.
Isometric stability property of certain Banach spaces.
Alexander Koldobsky*, University of Texas at San Antonio
(8864613) 
9:00 a.m.
The Haagerup invariant of von Neumann algebras.
Roger Smith*, Texas A\thsp\&\thsp M University, College Station
Allan Sinclair, University of Edinburgh, United Kingdom
(88646255) 
9:30 a.m.
On property (w) in spaces of vectorvalued functions.
Paulette Saab*, University of Missouri, Columbia
(8864646) 
10:00 a.m.
Constructions of L_p revisited.
Dale E. Alspach*, Oklahoma State University, Stillwater
(88646246) 
10:30 a.m.
Tensor products of operator spaces.
David Blecher*, University of Houston, University Park
(88646238)

8:00 a.m.

Saturday October 23, 1993, 8:00 a.m.10:50 a.m.
Special Session on Algebraic Combinatorics, III
Room 701, Rudder Tower

8:00 a.m.
The P and Qpolynomial schemes of thin type.
Paul Terwilliger*, University of Wisconsin, Madison
(88605215) 
8:30 a.m.
On a Clebsch Gordon problem.
Fan R.K. Chung*, Bellcore,445 South Street, Morristown, New Jersey
Shlomo Sternberg, Harvard University
(88605198) 
9:00 a.m.
Sharp characters of quasigroups and association schemes.
Kenneth W. Johnson*, Pennsylvania State University, Ogontz
(88605144) 
9:30 a.m.
Kitefree P and Q polynomial association schemes.
ChihWen Weng*, University of Wisconsin, Madison
(88605192) 
10:00 a.m.
Quotients of association schemes.
Chris D. Godsil, University of Waterloo
William J. Martin*, University of Winnipeg
(8860577) 
10:30 a.m.
Association schemes, superschemes, and permutation actions.
Jonathan D.H. Smith*, Iowa State University
(88605142)

8:00 a.m.

Saturday October 23, 1993, 8:30 a.m.10:50 a.m.
Special Session on Composition Operators on Spaces of Analytic Functions, III
Room 401, Rudder Tower

8:30 a.m.
The Berezin symbol with composition operators.
Semra Kilic*, University of New Hampshire
(88647244) 
9:00 a.m.
Composition preserves rigidity.
B. A. Lotto*, Vassar College
J. E. McCarthy, Washington University
(88647162) 
9:30 a.m.
Composition operators belonging to the Schatten classes and the geometry of their Eigenfunctions.
Richard Rochberg, Washington University, St. Louis
Hong Xian*, Washington University, St. Louis
(8864716) 
10:00 a.m.
Composition operators between different Bergman spaces.
Marian E. Robbins*, Bellarmine College
(88647161) 
10:30 a.m.
Homomorphisms of Banach algebras with range in C^1[0,1].
Herbert Kamowitz*, University of Massachusetts, Boston
Stephen Scheinberg, University of California, Irvine
(88646128)

8:30 a.m.

Saturday October 23, 1993, 8:30 a.m.10:50 a.m.
Special Session on Noncommutative Differential Geometry, II
Room 402, Rudder Tower

8:30 a.m.
Informal Discussion 
9:00 a.m.
Cyclic cohomology of smooth discrete groupoids.
Victor Nistor*, Pennsylvania State University, University Park
(88646234) 
9:30 a.m.
Exotic index and almost flat spectrum.
Steven Hurder*, University of Illinois, Chicago
(88658233) 
10:00 a.m.
Continuous fields of cyclic cocycles and an index formula for elliptic operators.
George A. Elliott, University of Copenhagen, Denmark
Toshikazu Natsume*, State University of New York, Buffalo
(8861912) 
10:30 a.m.
Zero spectrum problem for certain noncompact Riemannian manifolds.
Guoliang Yu*, University of Colorado, Boulder
(8864619)

8:30 a.m.

Saturday October 23, 1993, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, III
Room 502, Rudder Tower

9:00 a.m.
The superStefan problem and hysteresis.
T. D. Little, University of Texas at Austin
R. E. Showalter*, University of Texas at Austin
(8863556) 
9:30 a.m.
On multiple stationary black hole solutions of the EinsteinMaxwell equations.
Gilbert Weinstein*, University of Alabama at Birmingham
(8868325) 
10:00 a.m.
On solutions of certain nonlinear parabolic problems arising from low temperature heat conduction in metals.
Dongming Wei*, University of New Orleans
(8863536) 
10:30 a.m.
Reflectionless boundary propagation formulas for the wave equation.
Henry Warchall*, University of North Texas
(88635229)

9:00 a.m.

Saturday October 23, 1993, 9:00 a.m.10:50 a.m.
Special Session on Texas Geometry and Topology, II
Room 601, Rudder Tower

9:00 a.m.
Moduli of singular YangMills fields.
Lorenzo Sadun*, University of Texas, Austin
(88658208) 
9:40 a.m.
Complete constant mean curvature surfaces in hyperbolic space.
Yoshihiro Tonegawa*, Courant Institute of Mathematical Sciences, New York University
(88653163) 
10:20 a.m.
Existence of hypersurfaces of prescribed mean curvature.
T. David Hendricks*, Texas A\thsp\&\thsp M University, College Station
(88653226)

9:00 a.m.

Saturday October 23, 1993, 9:00 a.m.10:50 a.m.
Special Session on Representation Theory and Geometry of Noncommutative Algebras, III
Room 111, Student Services

9:00 a.m.
Indecomposable coalgebras and pointed Hopf algebras.
Susan Montgomery*, University of California, Los Angeles
(8861680) 
9:30 a.m.
Quantum Weyl algebras.
Anthony Giaquinto*, University of Michigan, Ann Arbor
James J. Zhang, University of Michigan, Ann Arbor
(8861666) 
10:00 a.m.
Regular graded algebras of global dimension three.
Darin R. Stephenson*, University of Michigan, Ann Arbor
(8861669) 
10:30 a.m.
Some 3dimensional skew polynomial rings.
Allen D. Bell*, University of Wisconsin, Milwaukee
S. Paul Smith, University of Washington
(88616104)

9:00 a.m.

Saturday October 23, 1993, 11:00 a.m.11:50 a.m.
Invited Address 
Saturday October 23, 1993, 1:30 p.m.2:20 p.m.
Invited Address
Nonconnected moduli spaces of positive sectional curvature metrics.
Room 601, Rudder Tower
Matthias Kreck, University of Mainz, Germany
Stephan Stolz*, University of Notre Dame
(88653258) 
Saturday October 23, 1993, 3:00 p.m.5:50 p.m.
Special Session on Harmonic Analysis and its Applications, IV
Room 510, Rudder Tower

3:00 p.m.
A class of bilinear forms on the Dirichlet type spaces.
Zhijian Wu*, University of Alabama, Tuscaloosa
(88647154) 
3:30 p.m.
H^PCorona theorems.
KaiChing Lin*, University of Alabama, Tuscaloosa
(8863039) 
4:00 p.m.
Atomic decomposition for Hardy spaces on domains in bold C^n.
Galia Dafni*, Princeton University
(88642127) 
4:30 p.m.
A Fatou theorem for the heat equation by way of a Carleson condition.
Caroline Sweezy*, New Mexico State University, Las Cruces
(8863541) 
5:00 p.m.
Unique continuation with weak type lower order terms.
Thomas Wolff, University of California, Berkeley
Guozhen Lu*, Wright State University, Dayton
(88635131) 
5:30 p.m.
Multilinear singular integrals, rough operators, and caloric layer potentials.
Steve Hofmann*, Wright State University, Dayton
(88642146)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:50 p.m.
Special Session on Several Complex Variables, IV
Room 707, Rudder Tower

3:00 p.m.
Polynomial hulls, Jensen measures, and clusters of analytic disks.
Evgeny A. Poletsky*, Syracuse University
(8863270) 
3:30 p.m.
On the existence of exceptional analytic disks.
KangTae Kim*, Brown University
(88632121) 
4:00 p.m.
Minimal interpolation in the ball of C^n.
J. A. Cima, University of North Carolina, Chapel Hill
Michael Stessin*, State University of New York, Albany
(8863217) 
4:30 p.m.
A removable singularities theorem for families of twodimensional fiberbundles and rational surfaces.
Adam Harris*, State University of New York, Stony Brook
(88632189) 
5:00 p.m.
Global analyticity for square box_b on three dimensional CR manifolds.
David S. Tartakoff*, University of Illinois at Chicago
Makhlouf Derridj, University of ParisSud, France
(8863209) 
5:30 p.m.
Analytic regularity of the bar partial_bNeumann problem on rigid tubes.
Ricardo L. Diaz*, University of Northern Colorado
(88635235)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:20 p.m.
Special Session on Composition Operators on Spaces of Analytic Functions, IV
Room 401, Rudder Tower

3:00 p.m.
Composition operators and the determining function.
Nina Zorboska*, University of Manitoba,
(88647213) 
3:30 p.m.
Degrees of normality for composition operators.
Douglas C. Szajda*, Saint Olaf College
(88630212) 
4:00 p.m.
Local spectral theory for some linear fractional composition operators.
R. C. Smith*, Mississippi State University
(88647120) 
4:30 p.m.
Compact composition operators on Blochtype spaces.
Kevin M. Madigan*, State University of New York, Albany
(8864752) 
5:00 p.m.
Weighted composition operators and evolutionary semigroups.
Yuri Latushkin*, University of Missouri, Columbia
S. MontgomerySmith, University of Missouri, Columbia
(8864762)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.4:50 p.m.
Special Session on Partial Differential Equations, IV
Room 502, Rudder Tower

3:00 p.m.
Obstacle scattering for elastic waves.
Jerome A. Goldstein*, Louisiana State University, Baton Rouge
Genbao Shi, Louisiana State University, Baton Rouge
(88635119) 
3:30 p.m.
On ground states of semilinear elliptic equations with supercritical and subcritical Sobolev growth.
Henghui Zou*, Northwestern University
(8863581) 
4:00 p.m.
A radial basis function approach to solving PDEs numerically.
Francis J. Narcowich*, Texas A\thsp\&\thsp M University, College Station
(88635197) 
4:30 p.m.
Nonradial solutions of a semilinear elliptic problem.
Henry Warchall, University of North Texas
Joseph Iaia*, University of North Texas
(88635227)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:50 p.m.
Special Session on Control Systems Governed By Partial Differential Equations, II
Room 501, Rudder Tower

3:00 p.m.
Modelling and controllability of a platebeam system.
John E. Lagnese*, Georgetown University
(88635133) 
3:30 p.m.
Approximation methods for robust control design for damped elastic systems.
Richard H. Fabiano, Jr.*, Texas A\thsp\&\thsp M University, College Station
(88649138) 
4:00 p.m.
Some controlled and uncontrolled wave and heat phenomena, a video show.
Goong Chen*, Texas A\thsp\&\thsp M University, College Station
Jianxin Zhou, Texas A\thsp\&\thsp M University, College Station
ChihHsun Chen, Texas A\thsp\&\thsp M University, College Station
(88635136) 
4:30 p.m.
Modeling of proofmass actuator.
Hankun Wang*, Wichita State University
(88635132) 
5:00 p.m.
Optimal control of GinzbergLandau equation.
Yuncheng You*, University of South Florida
(8864926) 
5:30 p.m.
A smoothing property of the KdV equation and its applications to control.
Bingyu Zhang*, University of Cincinnati
(88635140)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:05 p.m.
Special Session on Texas Geometry and Topology, III
Room 601, Rudder Tower

3:00 p.m.
A matrix for computing the Jones polynomial of a knot.
Louis P. Zulli*, Rice University
(8865775) 
3:40 p.m.
Defects of Schottky groups.
James W. Anderson*, Rice University
(88630187) 
4:20 p.m.
Dipole solutions to the Meron problem.
Karen Uhlenbeck*, University of Texas, Austin
(88658232)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:50 p.m.
Special Session on Reaction Diffusion Systems, IV
Room 504, Rudder Tower

3:00 p.m.
Reactive flows in porous media: Rigorous results.
John Chadam*, McMaster University
(88635172) 
3:30 p.m.
Practical persistence in ecological models via comparison methods.
R. S. Cantrell, University of Miami
C. Cosner*, University of Miami
(8863572) 
4:00 p.m.
Permanence in reaction diffusion systems.
Klaus Schmitt*, University of Utah
(88635152) 
4:30 p.m.
Informal Discussion

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.6:20 p.m.
Special Session on Nonselfadjoint Operator Algebras, IV
Room 410, Rudder Tower

3:00 p.m.
Simultaneous triangulizability and near commutativity.
A. R. Sourour*, University of Victoria
(88647224) 
3:30 p.m.
Cocycles on AF groupoids and their triangular algebras.
Belisario A. Ventura*, California State University, San Bernardino
(8864640) 
4:00 p.m.
Locally constant nonproduct type cocycles.
Belisario A. Ventura, California State University San Bernardino
Bruce H. Wagner*, Iowa State College, Ames
(88646183) 
4:30 p.m.
Algebra isomorphisms of triangular operator algebras.
Chaoxin Qiu*, Iowa City, Iowa
(8864795) 
5:00 p.m.
On certain Banach limits of triangular matrix algebras.
Richard L. Baker*, University of Iowa
(8864665) 
5:30 p.m.
Factorization of positive operators in nest algebras.
K. Davidson, University of Waterloo
H. Huang*, University of Waterloo
(88647204) 
6:00 p.m.
Local automorphisms on operator algebras.
Randall L. Crist*, Creighton University
(88646100)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.4:50 p.m.
Special Session on Representation Theory and Geometry of Noncommutative Algebras, IV
Room 111, Student Services

3:00 p.m.
Sklyanin algebras.
John Tate*, University of Texas, Austin
(88616110) 
3:30 p.m.
Linear spaces in noncommutative projective geometry.
Joanna M. Staniszkis*, Texas A\thsp\&\thsp M University, College Station
(88616158) 
4:00 p.m.
Noncommutative projective geometry.
Michael Artin, Massachusetts Institute of Technology
James J. Zhang*, University of Michigan, Ann Arbor
(88616165) 
4:30 p.m.
Graded rings of GelfandKirillov dimension two and projective curves.
M. Artin, Massachusetts Institute of Technology
J. T. Stafford*, University of Michigan, Ann Arbor
(88616118)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.6:20 p.m.
Special Session on Identities and Varieties of Algebraic Structures, IV
Room 110, Student Services

3:00 p.m.
On additional laws in the Burnside problem on periodic groups.
Efim Zelmanov*, University of Wisconsin, Madison
(88620173) 
3:30 p.m.
The word problem for the variety bold B_n.
Olga G. Kharlampovich*, McGill University
(88620176) 
4:00 p.m.
Minimal varieties of latticeordered groups.
W. Charles Holland*, Bowling Green State University
Nikolai Ya Medvedev, Altai State University, Russia
(8860601) 
4:30 p.m.
Some nonfinitely based varieties of group representations.
C. K. Gupta*, University of Manitoba
A. N. Krasilnikov, Moscow State Pedagogical Institute, Russia
(88620178) 
5:00 p.m.
Growth of varieties of group representations and the Gel'fandKirillov dimension.
Samuel M. Vovsi*, Trenton State College
(88620177) 
5:30 p.m.
On the additive groups of free objects in varieties of integral group representations.
A. N. Krasilnikov*, Moscow State Pedagogical Institute, Russia
(88620179) 
6:00 p.m.
Informal Discussion

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:20 p.m.
Special Session on Noncommutative Differential Geometry, III
Room 402, Rudder Tower

3:00 p.m.
Cosheaf homology and cyclic homology.
Paul F. Baum*, Pennsylvania State University, University Park
(8861863) 
3:30 p.m.
Informal Discussion 
4:00 p.m.
Fredholm operators on open manifolds.
Peter Haskell*, Virginia Polytech Institute & State University
(8865814) 
4:30 p.m.
Classification of certain C* algebras of real rank 0.
Guihua Gong*, University of Puerto Rico
(8864621) 
5:00 p.m.
Transversally elliptic operators for compact group actions.
Jeffrey Fox*, University of Colorado, Boulder
Peter Haskell, Virginia Polytech Institute & State University
(8865831)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.6:20 p.m.
Special Session on The Geometry of Banach Spaces and Operator Spaces, IV
Room 404, Rudder Tower

3:00 p.m.
Asymptotic infinite dimensional theory.
Vitali Milman*, Tel Aviv University, Israel
B. Maurey, University of Paris VII, France
N. TomczakJaegerman, University of Alberta
(88646252) 
3:30 p.m.
The operator amenability of A(G) for compact groups G.
ZhongJin Ruan*, University of Illinois, UrbanaChampaign
(88647254) 
4:00 p.m.
The maximal operator space structure on a normed space.
Vern Paulsen*, University of Houston, University Park
(88646240) 
4:30 p.m.
Stability of some types of RadonNikodym properties.
Narcisse Randrianantoanina, University of Missouri, Columbia
Elias Saab*, University of Missouri, Columbia
(8864647) 
5:00 p.m.
On some properties of l_ptensor products.
Alvaro Arias*, University of Texas, San Antonio
(88646247) 
5:30 p.m.
Problem Session 
6:00 p.m.
On Banach spaces with the 2summing property.
T. Figiel, Polish Academy of Science, Poland
W. B. Johnson*, Texas A\thsp\&\thsp M University, College Station
G. Schechtman, Weizmann Institute of Science, Israel
(88646257)

3:00 p.m.

Saturday October 23, 1993, 3:00 p.m.5:50 p.m.
Special Session on Algebraic Combinatorics, IV
Room 701, Rudder Tower

3:00 p.m.
Antipodal distance transitive covers of complete bipartite graphs.
A. A. Ivanov, Institute for System Studies, Russia
Robert A. Liebler*, Colorado State University
Tim Pentilla, University of Western Australia, Australia
Cheryl E. Praeger, University of Western Australia, Australia
(88605148) 
3:30 p.m.
Krein conditions for coherent configurations.
Sylvia A. Hobart*, University of Wyoming
(88605193) 
4:00 p.m.
Quadratic forms in the construction of designs and near large sets of designs.
Dwijendra RayChaudhuri*, Ohio State University, Columbus
(88605199) 
4:30 p.m.
Twice Qpolynomial distanceregular graphs.
Garth A. Dickie*, University of Wisconsin, Madison
(88605222) 
5:00 p.m.
Symmetric pseudocyclic association schemes.
Sung Yell Song*, Iowa State College, Ames
(88605143) 
5:30 p.m.
On a generalization of the qJohnson association scheme.
Gregory Hill*, University of North Texas
(88605218)

3:00 p.m.