AMS Sectional Meeting Full Program
Current as of Tuesday, April 12, 2005 15:08:45
1990 Fall Central Section Meeting
Denton, TX, November 23, 1990
Meeting #861
Associate secretaries: Andy R Magid, AMS amagid@ou.edu
Friday November 2, 1990

Friday November 2, 1990, 7:30 a.m.9:50 a.m.
Special Session on Geometric Inequalities and Convex Bodies, I
Room 412, University Union Building

7:30 a.m.
Geometric inequalities governing multiplicative estimates and integral maximum principles in nonlinear elliptic boundary value problems.
Ilya J. Bakelman*, Texas A\thsp\&\thsp M University, College Station
(8613513) 
8:00 a.m.
Qualitative behavior of solutions to a system of partial differential equations from nonlinear elasticity.
Patricia Bauman*, Purdue University, West Lafayette
Nicholas Owen, The University of Sheffield, England
Daniel Phillips, Purdue University, West Lafayette
(8613525) 
8:30 a.m.
The Weyl problem for surfaces of nonnegative curvature.
Joseph Iaia*, University of Pennsylvania
(8613514) 
9:00 a.m.
On a family of torsional creep problems.
Bernhard Kawohl*, University of Heidelberg, Federal Republic of Germany
(8613504) 
9:30 a.m.
Singularities and the conformal scalar curvature equation.
Robert C. McOwen*, Northeastern University
(8613515)

7:30 a.m.

Friday November 2, 1990, 7:30 a.m.9:50 a.m.
Special Session on The Probability Theory of Patterns and Runs, I
Room 415, University Union Building

7:30 a.m.
Moving average representations in prediction theory.
Jay Rothman*, University of Colorado, Denver
(86160184) 
8:00 a.m.
Distribution of periods and frequencies of runs in binary sequences.
Solomon W. Golomb*, University of Southern California
(86160185) 
8:30 a.m.
Probabilistic analysis of some problems in molecular genetics.
Betty Tang*, Arizona State University
(86160108) 
9:00 a.m.
Exchangeability in the conditional distribution theory of runs.
Eugene F. Schuster*, University of Texas, El Paso
(86160115) 
9:30 a.m.
Some limit theorems on distributional patterns of balls in urns.
MingYing Leung*, University of Texas, San Antonio
(86160103)

7:30 a.m.

Friday November 2, 1990, 7:30 a.m.9:50 a.m.
Special Session on Algebraic Geometry, I
Room 418, University Union Building

7:30 a.m.
Homotopy limits in general (co)fibration categories.
Jerome William Hoffman*, Louisiana State University, Baton Rouge
(86155147) 
8:00 a.m.
Goppa codes and Weierstrass gaps.
Robert F. Lax*, Louisiana State University, Baton Rouge
(8611439) 
8:30 a.m.
Periods of mixed cusp forms.
Min Ho Lee*, University of Northern Iowa
(8611138) 
9:00 a.m.
A beginner's guide to Persson diagrams.
Charles F. Schwartz*, Rider College
William L. Hoyt, Rutgers University, New Brunswick
(86114182) 
9:30 a.m.
Nef cotangent bundles of branched coverings.
Michael J. Spurr*, East Carolina University
(86114142)

7:30 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Banach SpacesFunctional Analysis, I
Gold Eagle Suite B, University Union Building

8:00 a.m.
On the complemented subspaces of X_p.
Dale E. Alspach*, Oklahoma State University, Stillwater
(8614670) 
8:30 a.m.
Regular and DunfordPettis operators on L_1.
Kevin T. Andrews*, Oakland University
(8614784) 
9:00 a.m.
The Vitali integral convergence theorem and uniform absolute continuity.
Elizabeth M. Bator*, University of North Texas
Russell G. Bilyeu, University of North Texas
Paul Lewis, University of North Texas
(8614674) 
9:30 a.m.
An arbitrarily distortable space.
Thomas Schlumprecht*, University of Texas, Austin
(8614683)

8:00 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Commutative Algebra, I
Gold Eagle Suite C, University Union Building

8:00 a.m.
The Noetherian property in rings of integervalued polynomials.
Robert Gilmer, Florida State University
William Heinzer, Purdue University, West Lafayette
David Lantz*, Colgate University
(86113151) 
8:30 a.m.
Comaximizable primes.
Raymond C. Heitmann, University of Texas, Austin
Stephen McAdam*, University of Texas, Austin
(8611393) 
9:00 a.m.
Torsionfree divisible groups as unit groups of fields.
Maria Contessa, University Degli Studi, Italy
Joe L. Mott*, Florida State University
Warren Nichols, Florida State University
(86113192) 
9:30 a.m.
Factorization in Dedekind domains.
Scott Chapman*, Trinity University
William W. Smith, University of North Carolina, Chapel Hill
(86113191)

8:00 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Texas Topology and Geometry, I
Room 410, University Union Building

8:00 a.m.
The total Chern class is an infinite loop map.
Benjamin M. Mann*, University of New Mexico
(86155170) 
8:30 a.m.
Counting periodic tilings of the plane.
Reinhard O. W. Franz*, University of Bielefeld, Federal Republic of Germany
(86105160) 
9:00 a.m.
On the geometry of the moduli space of flat tori.
Daniel B. Swearingen*, Rice University
(86151178) 
9:30 a.m.
The Hyperkahler geometry of instanton moduli.
Charles P. Boyer*, University of New Mexico
(86153140)

8:00 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Low Dimensional Topology, I
Room 411, University Union Building

8:00 a.m.
Geodesic separation points for Fuchsian groups and laminations in surfaces.
Darryl McCullough*, University of Oklahoma
(8615767) 
8:30 a.m.
Geometric structures on branched covers over universal links.
Kerry Jones*, University of Texas, Austin
(8615763) 
9:00 a.m.
Links as critical sets.
Masahico Saito*, University of Texas, Austin
(8615764) 
9:30 a.m.
Dehn functions of groups, extensions of twocomplexes, and quasiisometries.
Stephen G. Brick*, University of Oklahoma
(86120163)

8:00 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Representation Theory of Lie Groups, I
Gold Eagle Suite A, University Union Building

8:00 a.m.
Categories of Whittaker modules.
Dragan Mili\v ci\'c*, University of Utah
(86122130) 
8:30 a.m.
Analytic version of Kempf's geometric resolution.
Mario Candia*, University of Utah
(86122128) 
9:00 a.m.
A singular representation of E_6.
B. T. Binegar*, Oklahoma State University, Stillwater
R. Zierau, Oklahoma State University, Stillwater
(86122162) 
9:30 a.m.
Lusztig's conjecture for negative level modules.
Luis Casian*, Ohio State University, Columbus
(86117137)

8:00 a.m.

Friday November 2, 1990, 8:00 a.m.9:50 a.m.
Special Session on Differential Equations, I
Silver Eagle Suite C, University Union Building

8:00 a.m.
On a model equation for the spectrum of 3D turbulence.
Ciprian Foias*, Indiana University, Bloomington
John W. Neuberger, University of North Texas
Roger Temam, University of Paris XI, France and Indiana University, Bloomington
(86135118) 
8:30 a.m.
Discrete eigenfunction approximations for continuous spectrum operators.
Robert M. Kauffman*, University of Alabama, Birmingham
(8613430) 
9:00 a.m.
A polefree strip for potential scattering.
Brian J. Loe*, Iowa State University
(86135117) 
9:30 a.m.
Symbolic manipulation software and the study of differential equations.
Man Kam Kwong*, Argonne National Laboratory
(86134157)

8:00 a.m.

Friday November 2, 1990, 10:00 a.m.10:50 a.m.
Invited Address
NavierStokes equations: Some new results and directions.
Silver Eagle Suite A, University Union Building
Peter S. Constantin*, University of Chicago
(86135127) 
Friday November 2, 1990, 12:15 p.m.1:05 p.m.
Invited Address
Classifying spaces and finite loop spaces.
Silver Eagle Suite A, University Union Building
Clarence W. Wilkerson, Jr.*, Purdue University, West Lafayette
(86155215) 
Friday November 2, 1990, 1:30 p.m.3:50 p.m.
Special Session on Arithmetic Groups, I
Room 417, University Union Building

1:30 p.m.
An algebraic realization of the cohomology of a Hilbert modular variety.
B. Brent Gordon*, University of Oklahoma
(86111204) 
2:00 p.m.
Informal Discussion 
2:30 p.m.
Modular symbols and the Steinberg representation.
Mark S. Reeder*, University of Oklahoma
(86157138) 
3:00 p.m.
Basic sharblies, ideal skeleta of SL(n,R)/SO(n,R), and a generalization of "reduction to unimodular symbols."
Lee Rudolph*, Clark University
(86157155) 
3:30 p.m.
Informal Discussion

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.4:20 p.m.
Special Session on Banach SpacesFunctional Analysis, II
Gold Eagle Suite B, University Union Building

1:30 p.m.
A fixed point property for the Lorentz space Lp,1(mu).
N. L. Carothers, Bowling Green State University
S. J. Dilworth*, University of South Carolina, Columbia
C. J. Lennard, University of Pittsburgh, Pittsburgh
D. A. Trautman, The Citadel
(8614681) 
2:00 p.m.
Rosenthal sets and the radonnikodym property.
Patrick N. Dowling*, Miami University, Oxford
(8614677) 
2:30 p.m.
Nearisometries and centralizers.
Ehrhard Behrends, Freie University of Berlin, Federal Republic of Germany
Peter Greim*, The Citadel
David A. Trautman, The Citadel
(86146139) 
3:00 p.m.
Sequential domination in Banach spaces and some new classes of Baire1 functions.
C. S. Schumacher*, Kenyon College
(8614689) 
3:30 p.m.
Complemented subspaces of Banach lattices.
Nigel Kalton*, University of Missouri, Columbia
(8614688) 
4:00 p.m.
On the strongly extreme points of convex bodies in separable Banach space.
B. V. Godun, Kharkov Institute, USSR
BorLuh Lin*, University of Iowa
S. L. Troyanski, Sofia University, Bulgaria
(8614680)

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.4:50 p.m.
Special Session on Geometric Inequalities and Convex Bodies, II
Room 412, University Union Building

1:30 p.m.
Pseudoconvexity for semiRiemannian spaces.
John K. Beem*, University of Missouri, Columbia
(8615205) 
2:00 p.m.
Asymptotic approximations to fundamental solutions of differential equations on manifolds.
S. A. Fulling*, Texas A\thsp\&\thsp M University, College Station
(8614116) 
2:30 p.m.
Croftontype formulas and radon transforms.
Paul R. Goodey*, University of Oklahoma
(8615226) 
3:00 p.m.
Stability properties of geometric inequalities.
H. Groemer*, University of Arizona
(8615222) 
3:30 p.m.
Inequalities for mixed projection bodies.
Erwin Lutwak*, Polytechnic Institute of New York
(8615223) 
4:00 p.m.
Elliptic systems for a medium with microstructure.
R. E. Showalter*, University of Texas, Austin
(8613503) 
4:30 p.m.
NonEuclidean bodies of constant width.
Boris V. Dekster*, Mount Allison University, Canada
(8615201)

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.4:20 p.m.
Special Session on Commutative Algebra, II
Gold Eagle Suite C, University Union Building

1:30 p.m.
Integral domains with finitely generated groups of divisibility.
D. D. Anderson*, University of Iowa
(8611394) 
2:00 p.m.
Length functions on integral domains.
David F. Anderson*, University of Tennessee, Knoxville
Paula Pruis, Purdue University, West Lafayette
(8611391) 
2:30 p.m.
On nflat modules over a commutative ring.
David E. Dobbs*, University of Tennessee, Knoxville
(8611392) 
3:00 p.m.
Artinian subrings of a commutative ring.
Robert Gilmer, Florida State University
William Heinzer*, Purdue University, West Lafayette
(86113190) 
3:30 p.m.
On tlinked overrings.
David E. Dobbs, University of Tennessee, Knoxville
Evan G. Houston*, University of North Carolina, Charlotte
Thomas G. Lucas, University of North Carolina, Charlotte
Moshe Roitman, University of Haifa, Israel
Muhammad Zafrullah, Winthrop College
(86113211) 
4:00 p.m.
Endomorphism overrings of Prufer domains.
M. Fontana, University of RomeLa Sapienza, Italy
J. Huckaba*, University of Missouri, Columbia
I. Papick, University of Missouri, Columbia
M. Roitman, University of Haifa, Israel
(86113193)

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.4:30 p.m.
Special Session on Texas Topology and Geometry, II
Room 410, University Union Building

Friday November 2, 1990, 1:30 p.m.4:00 p.m.
Special Session on The Probability Theory of Patterns and Runs, II
Room 415, University Union Building

1:30 p.m.
Runs of superimposed Poisson processes.
Hao Zhang*, University of Pennsylvania
(86160101) 
2:00 p.m.
New exact runs tests for randomness.
Marilyn A. Agin*, Michigan Technological University
(86162104) 
2:30 p.m.
Approximate hypercube reliabilities.
Sanjay Khunger*, Michigan Technological University
(86160105) 
3:00 p.m.
Exact and limiting runs distributions.
Michelle C. Gornowicz*, Michigan Technological University
(86160107) 
3:30 p.m.
Informal Discussion

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.2:30 p.m.
Special Session on Low Dimensional Topology, II
Room 411, University Union Building

Friday November 2, 1990, 1:30 p.m.4:50 p.m.
Special Session on Representation Theory of Lie Groups, II
Gold Eagle Suite A, University Union Building

1:30 p.m.
Representations of Lie algebras.
Thomas Enright*, University of California at San Diego, La Jolla
(86122214) 
2:00 p.m.
On the unitary representations of SO(p,q): The regular integral case.
Susana Alicia SalamancaRiba*, New Mexico State University, Las Cruces
(86122164) 
2:30 p.m.
Dual pairs and holonomic systems.
Tomasz Przebinda*, Louisiana State University, Baton Rouge
(8612256) 
3:00 p.m.
The Capelli identity and unitary representations.
Siddhartha Sahi*, Princeton University
(8612253) 
3:30 p.m.
Covariant differential operators.
Mark G. Davidson*, Louisiana State University, Baton Rouge
Thomas J. Enright, University of California at San Diego, La Jolla
Ronald J. Stanke, Baylor University
(8614357) 
4:00 p.m.
Szego maps and unitary highest weight representations.
Mark G. Davidson, Louisiana State University, Baton Rouge
Ronald J. Stanke*, Baylor University
(8612258) 
4:30 p.m.
Informal Discussion

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.4:50 p.m.
Special Session on Algebraic Geometry, II
Room 418, University Union Building

1:30 p.m.
Exponential sums and Newton polyhedra.
Alan Adolphson*, Oklahoma State University, Stillwater
(86114213) 
2:00 p.m.
Characteristic numbers for singular cubics.
Paolo Aluffi*, Oklahoma State University, Stillwater
(86114124) 
2:30 p.m.
Birational mappings between hypersurfaces of degree M+1 in P^M+1.
Bruce Crauder*, Oklahoma State University, Stillwater
(86114153) 
3:00 p.m.
Families of Abelian varieties over modular curves, the generalized Tate conjecture, and ordinary primes for modular forms.
B. Brent Gordon*, University of Oklahoma
(86114219) 
3:30 p.m.
Hilbert modular threefolds.
H. G. Grundman*, Massachusetts Institute of Technology
(86114135) 
4:00 p.m.
Homogeneous and schemetheoretic generation of varieties by quadrics.
Sheldon Katz*, Oklahoma State University, Stillwater
(86114134) 
4:30 p.m.
On the existence of components of the Hilbert scheme with the expected number of moduli.
Angelo Lopez*, University of California, Riverside
(86114181)

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.3:50 p.m.
Special Session on Several Complex Variables, I
Room 413, University Union Building

1:30 p.m.
Topology of Leviflat hypersurfaces.
David E. Barrett*, University of Michigan, Ann Arbor
(86132165) 
2:00 p.m.
On Leviflat hypersurfaces.
Zbigniew Slodkowski*, University of Illinois, Chicago
Giuseppe Tomassini, Scuola Normale Superiore, Italy
(86132166) 
2:30 p.m.
Real surfaces in complex varieties.
Gary A. Harris*, Texas Technical University
(8613206) 
3:00 p.m.
Finite type conditions for a single complex vector field.
John P. D'Angelo*, University of Illinois, UrbanaChampaign
(8613234) 
3:30 p.m.
Behavior of holomorphic functions near weakly pseudoconvex boundary points.
Frank Beatrous*, University of Pittsburgh, Pittsburgh
(86132150)

1:30 p.m.

Friday November 2, 1990, 1:30 p.m.3:00 p.m.
Session on Algebra, Geometry, and Analysis
Ponder Room, University Union Building

1:30 p.m.
Algebra structures on resolutions of rings defined by grade four almost complete intersections.
Susan M. Palmer*, Southwest Missouri State University
(8611395) 
1:50 p.m.
Some new cohomological formulas for the Chow groups.
Yevsey Nisnevich*, Johns Hopkins University, Baltimore
(86114141) 
2:10 p.m.
Monotone operators on R^n.
David Gurney*, Southern Louisiana University
(86126176) 
2:30 p.m.
A Levinsontype lemma for differential equations without absolute convergence.
Dale T. Smith*, University of North Texas
(86134114) 
2:50 p.m.
Complemented subspaces of spaces obtained by interpolation.
Stephen J. MontgomerySmith*, University of Missouri, Columbia
D. J. H. Garling, University of Cambridge, England
(86146149)

1:30 p.m.

Friday November 2, 1990, 2:00 p.m.4:50 p.m.
Special Session on Differential Equations, II
Room 406, General Academic Building

2:00 p.m.
Differential equations on open sets with fractal boundary.
Michel L. Lapidus*, Yale University and University of Georgia
(86135156) 
2:30 p.m.
Recent developments in semipositone problems.
Ratnasingham Shivaji*, Mississippi State University
(86135125) 
3:00 p.m.
Positivity properties and stability of solitarywave solutions of model equations for long waves.
John P. Albert*, University of Oklahoma
(86135169) 
3:30 p.m.
Existence and nonexistence results for ground states of quasilinear elliptic equations.
James Serrin, University of Minnesota, Minneapolis
Henghui Zou*, University of Minnesota, Minneapolis
(8613549) 
4:00 p.m.
Reconstruction techniques for classical inverse SturmLiouville problems.
William Rundell*, Texas A\thsp\&\thsp M University, College Station
Paul E. Sacks, Iowa State University
(8613446) 
4:30 p.m.
Symplectic continued fractions arising in the discrete regulator problem.
Calvin D. Ahlbrandt*, University of Missouri, Columbia
(86134152)

2:00 p.m.
Saturday November 3, 1990

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Geometric Inequalities and Convex Bodies, III
Room 412, University Union Building

7:00 a.m.
Null foliations and gravitational plane wave metrics.
P. Ehrlich*, University of Florida
G. Emch, University of Florida
(8615302) 
7:30 a.m.
Deforming curves on convex surfaces to simple closed geodesics.
Michael E. Gage*, University of Rochester
(86153111) 
8:00 a.m.
Geometry and uncertainty.
Francis J. Narcowich*, Texas A\thsp\&\thsp M University, College Station
(8615124) 
8:30 a.m.
Applications of geometric methods to elliptic and parabolic problems.
Andrejs E. Treibergs*, University of Utah
(8615327) 
9:00 a.m.
Inequalities and random convex bodies.
Richard A. Vitale*, University of Connecticut, Storrs
(8615221) 
9:30 a.m.
Evolution problem for plastic antiplanar shear.
Xiaodong Zhou*, Rice University
(8614928)

7:00 a.m.

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Texas Topology and Geometry, III
Room 410, University Union Building

7:00 a.m.
Some quasilinear systems with a lack of ellipticity.
S. Walter Wei*, University of Oklahoma
(86158179) 
7:30 a.m.
Determinants on CR manifolds.
Terry Lohrenz*, Wiess School of Natural Sciences, Rice University
(86158196) 
8:00 a.m.
The orthogonal spectrum of a hyperbolic manifold.
Ara Basmajian*, University of Oklahoma
(86153177) 
8:30 a.m.
Examples of symplectic structures on fiber bundles.
Brian Kasper*, University of Texas, Austin
(8615396) 
9:00 a.m.
The gradient flow for the YangMills functional in two and three dimensions.
Johan R\aa de*, University of Texas, Austin
(86135207) 
9:30 a.m.
Bifurcation analysis of the Eckhaus instability.
Laurette S. Tuckerman*, University of Texas, Austin
(86176180)

7:00 a.m.

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Low Dimensional Topology, III
Room 411, University Union Building

7:00 a.m.
Links with trivial AlexanderGassner matrices.
Tim D. Cochran*, Rice University
(8615759) 
7:30 a.m.
Torsion and the CassonGordon invariant.
Patrick M. Gilmer*, Louisiana State University, Baton Rouge
Charles Livingston, Indiana University, Bloomington
(8615760) 
8:00 a.m.
Homotopically ribbon concordance of fibered knots.
Katura Miyazaki*, University of California at San Diego, La Jolla
(8615766) 
8:30 a.m.
Branched coverings of 3manifolds and patterned surfaces.
John Hempel*, Rice University
(8615769) 
9:00 a.m.
Contractible open manifolds which are not covering spaces.
David G. Wright*, Brigham Young University
(8615771) 
9:30 a.m.
Examples of eventually endirreducible 3manifolds of nonfinite genus at infinity.
Bobby Neal Winters*, Pittsburg State University
(8615711)

7:00 a.m.

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Representation Theory of Lie Groups, III
Gold Eagle Suite A, University Union Building

7:00 a.m.
A comparison theorem for nhomology.
Henryk Hecht*, University of Utah
Joseph Taylor, University of Utah
(86122129) 
7:30 a.m.
Characteristic cycles of holomorphic discrete series.
JenTseh Chang*, Oklahoma State University, Stillwater
(8612252) 
8:00 a.m.
Local representations, analytic continuation, and integrability of Lie algebras of operators.
Humberto E. Prado*, Oklahoma State University, Stillwater
(86122122) 
8:30 a.m.
Primary summand functions on 3dimensional, compact solvmanifolds.
Carolyn B. Pfeffer*, Rutgers University, New Brunswick
(86122123) 
9:00 a.m.
An explicit plancherel formula for exponential solvable Lie groups.
Bradley N. Currey*, Saint Louis University
(8612255) 
9:30 a.m.
Global regularity on 3dimensional solvmanifolds.
Jacek M. Cygan*, Louisiana State University, Baton Rouge
Leonard F. Richardson, Louisiana State University, Baton Rouge
(8612208)

7:00 a.m.

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Differential Equations, III
Silver Eagle Suite C, University Union Building

7:00 a.m.
Existence theorems for secondorder boundary value problems.
Hans G. Kaper*, Argonne National Laboratory
Mariette Knapp, Argonne National Laboratory
Man Kam Kwong, Argonne National Laboratory
(86134206) 
7:30 a.m.
Degenerate parabolic systems for a medium with microstructure.
R. E. Showalter*, University of Texas, Austin
N. J. Walkington, Carnegie Mellon University
(8613532) 
8:00 a.m.
Strain softening in viscoelasticity of the rate type.
Athanassios E. Tzavaras*, University of Wisconsin, Madison
(86135119) 
8:30 a.m.
Bifurcation phenomena in a singular DAE detonation problem.
W. Zhang, Southern Methodist University
I. Gladwell*, Southern Methodist University
(8613447) 
9:00 a.m.
Reactiondiffusion systems from climate modeling.
Georg Hetzer*, Auburn University, Auburn
(8613550) 
9:30 a.m.
Asymptotic solutions of LotkaVolterra competition equations.
Shair Ahmad*, University of Texas, San Antonio
(8613445)

7:00 a.m.

Saturday November 3, 1990, 7:00 a.m.9:50 a.m.
Special Session on Algebraic Geometry, III
Room 418, University Union Building

7:00 a.m.
On desingularized HorrocksMumford quintics.
Ciprian Borcea*, Institute for Advanced Study
(86114120) 
7:30 a.m.
Period relations for twisted Legendre equations.
W. L. Hoyt*, Rutgers University, New Brunswick
(86114154) 
8:00 a.m.
Field of definition of the group of sections of elliptic surfaces.
Masato Kuwata*, University of British Columbia,
(86111198) 
8:30 a.m.
The singularities of the parameter surface of a minimal elliptic threefolds.
Antonella Grassi*, Tufts University
(86114197) 
9:00 a.m.
On a conjecture of Tyurin.
YunGang Ye*, Duke University
(86114212) 
9:30 a.m.
Adjunction for vector bundles.
Qi Zhang*, Johns Hopkins University, Baltimore
(86114183)

7:00 a.m.

Saturday November 3, 1990, 7:30 a.m.9:50 a.m.
Special Session on Arithmetic Groups, II
Room 417, University Union Building

7:30 a.m.
Cohomology of the symplectic group SP_4(Z).
Alan B. Brownstein*, Rutgers University, Newark
(8611143) 
8:00 a.m.
The "coadjoint" representation of PSp_4(2).
Ronnie Lee, Yale University
Steven H. Weintraub*, Louisiana State University, Baton Rouge
(8612007) 
8:30 a.m.
A central series of Torelli groups and its relation to invariants of 3manifolds.
Ronnie Lee*, Yale University
(86155218) 
9:00 a.m.
Commensurability of isospectral arithmetic hyperbolic 2 and 3 manifolds.
Alan W. Reid*, Ohio State University, Columbus and University of Aberdeen, Scotland
(86111116) 
9:30 a.m.
Short geodesics in arithmetic hyperbolic 3manifolds.
Alan W. Reid, Ohio State University, Columbus and University of Aberdeen, Scotland
Walter D. Neumann*, Ohio State University, Columbus
(8615742)

7:30 a.m.

Saturday November 3, 1990, 7:30 a.m.9:50 a.m.
Special Session on Banach SpacesFunctional Analysis, III
Gold Eagle Suite B, University Union Building

7:30 a.m.
A problem on spreading models.
E. Odell*, University of Texas, Austin
(8614690) 
8:00 a.m.
A new approximation scheme for monotone operators on Banach spaces.
Simon Fitzpatrick, University of Auckland, New Zealand
R. R. Phelps*, University of Washington
(8614678) 
8:30 a.m.
The Auerbach volumeratio for finitedimensional Banach spaces.
Haskell Rosenthal*, University of Texas, Austin
(8614682) 
9:00 a.m.
On unconditionally converging and weakly precompact operators.
Elias Saab*, University of Missouri, Columbia
Paulette Saab, University of Missouri, Columbia
(8614687) 
9:30 a.m.
On integral and strictly integral operators.
Paulette Saab*, University of Missouri, Columbia
(8614686)

7:30 a.m.

Saturday November 3, 1990, 7:30 a.m.9:50 a.m.
Special Session on Commutative Algebra, III
Gold Eagle Suite C, University Union Building

7:30 a.m.
On polynomial extensions of atomic domains.
Moshe Roitman*, University of Haifa, Israel and University of North Carolina, Charlotte
(86113220) 
8:00 a.m.
Infinite integral extensions and CohenMacaulay algebras.
Melvin Hochster, University of Michigan, Ann Arbor
Craig Huneke*, Purdue University, West Lafayette
(86113187) 
8:30 a.m.
Powers of ideals having small analytic deviation.
Sam Huckaba*, Florida State University
Craig Huneke, Purdue University, West Lafayette
(86113208) 
9:00 a.m.
Uniform annihilation of local cohomology and of Koszul homology.
K. N. Raghavan*, Purdue University, West Lafayette
(86113186) 
9:30 a.m.
Tight closure, joint reductions, and the BrianconSkoda theorem.
Irena Swanson*, Purdue University, West Lafayette
(86113194)

7:30 a.m.

Saturday November 3, 1990, 7:30 a.m.9:50 a.m.
Special Session on Several Complex Variables, II
Room 413, University Union Building

7:30 a.m.
Local analyticity for box_b and the barred partialNeumannproblem for some weakly pseudoconvex domains.
David S. Tartakoff*, University of Illinois, Chicago
(86132145) 
8:00 a.m.
Estimates for the Bergman metric.
Jeffery McNeal*, Princeton University
(86132167) 
8:30 a.m.
L^2solvability and boundary regularity of the barred partial_bproblem on some pseudoconvex CRmanifolds with boundary.
Ricardo L. Diaz*, Texas A\thsp\&\thsp M University, College Station
(86132173) 
9:00 a.m.
The CauchyRiemann equations in convex domains.
John C. Polking*, Rice University
(86132203) 
9:30 a.m.
Sobolev estimates for the complex Green operator on a class of weakly pseudoconvex boundaries.
Harold P. Boas*, Texas A\thsp\&\thsp M University, College Station
Emil J. Straube, Texas A\thsp\&\thsp M University, College Station
(86132133)

7:30 a.m.

Saturday November 3, 1990, 8:00 a.m.9:50 a.m.
Special Session on The Probability Theory of Patterns and Runs, III
Room 415, University Union Building

8:00 a.m.
Distribution of balls into urns, where a specific number of urns contains a prescribed number of balls.
S. G. Papastavridis*, University of Patras, Greece
(86160102) 
8:30 a.m.
On reliabilities of certain large linearly connected engineering systems.
James C. Fu*, University of Manitoba
(86160100) 
9:00 a.m.
Consecutive koutofn systems and some generalizations.
William S. Griffith*, University of Kentucky
(86160109) 
9:30 a.m.
Patterns and runs in probability theory.
Anant P. Godbole*, Michigan Technological University
(86160106)

8:00 a.m.

Saturday November 3, 1990, 8:00 a.m.9:30 a.m.
Session on Geometry
Ponder Room, University Union Building

8:00 a.m.
A new stability problem of ULAM.
John M. Rassias*, American College of Greece
(86147126) 
8:20 a.m.
Nonlattice packings and coverings with congruent copies of certain convex bodies.
Andr\'as Bezdek, Hungarian Academy of Science, Hungary
G\'abor Fejes T\'oth, Hungarian Academy of Sciences, Cornell University
Wlodzimierz Kuperberg*, Auburn University, Auburn
(86152113) 
8:40 a.m.
Saturated packings and reduced coverings.
G\'abor Fejes T\'oth*, Hungarian Academy of Sciences, Cornell University
Wlodzimierz Kuperberg, Auburn University, Auburn
(86152112) 
9:00 a.m.
Flat radon transforms.
Eric L. Grinberg*, Temple University, Philadelphia
(86153110) 
9:20 a.m.
A combinatorial unknot detector.
Randall H. Weiss*, Blackburn College
(86155216)

8:00 a.m.

Saturday November 3, 1990, 10:00 a.m.10:50 a.m.
Invited Address
Galois representations attached to GL(n,Z)
Lyceum Room, University Union Building
Avner D. Ash*, Ohio State University, Columbus
(8611133) 
Saturday November 3, 1990, 12:30 p.m.1:20 p.m.
Invited Address
Combinatorics of intersecting surfaces in 3manifolds.
Lyceum Room, University Union Building
John E. Luecke*, University of Texas, Austin
(86199221) 
Saturday November 3, 1990, 2:00 p.m.3:50 p.m.
Special Session on Arithmetic Groups, III
Room 417, University Union Building

2:00 p.m.
Informal Discussion 
2:30 p.m.
Examples of discrete subgroups of SU(2,1).
William M. Goldman*, University of Maryland, College Park
(8615741) 
3:00 p.m.
Compactifications of quotient spaces of GL(n,R).
Douglas Grenier*, Johns Hopkins University
(8612240) 
3:30 p.m.
Finite upper half planes.
Audrey Terras*, University of California at San Diego, La Jolla
(8611185)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:20 p.m.
Special Session on Banach SpacesFunctional Analysis, IV
Gold Eagle Suite B, University Union Building

2:00 p.m.
Compacta in Banach spaces.
J. H. M. Whitfield*, Lakehead University
(8614679) 
2:30 p.m.
Pettis integrable functions as a.e. weak sequential limits of simple functions.
Gunnar Stefansson*, Pennsylvania State University, Altoona
(8614675) 
3:00 p.m.
Spectral theory in Banach algebras related by a continuous homomorphism.
Timothy W. Randolph*, University of Missouri, Rolla
(8614776) 
3:30 p.m.
Isometric involutions on group algebras.
Paul Patterson*, Saint Louis University
(8614673) 
4:00 p.m.
Equicontinuous and relatively weakly compact subsets of the space of Bochner integrable functions L_1(mu,X).
Mark Gruenwald*, University of Evansville
Georg Schl\"uchtermann, Math. Institut der Universit\"at M\"unchen, Germany
(8614672)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:50 p.m.
Special Session on Geometric Inequalities and Convex Bodies, IV
Room 412, University Union Building

2:00 p.m.
Harmonic maps with nontrivial higher dimensional singularities.
G. Liao*, University of Texas, Arlington
N. Smale, University of Utah
(8615810) 
2:30 p.m.
Instability of an equilibrium in a potential field.
Steven D. Taliaferro*, Texas A\thsp\&\thsp M University, College Station
(8617017) 
3:00 p.m.
Stability and bifurcation of constant mean curvature surfaces in a wedge.
Thomas I. Vogel*, Texas A\thsp\&\thsp M University, College Station
(8615319) 
3:30 p.m.
Differential and integral inequalities.
S. Walter Wei*, University of Oklahoma
(8615318) 
4:00 p.m.
A note on the stability theorem of J. L. Barbosa and M. Do Carmo for closed surfaces of constant mean curvature.
Henry C. Wente*, University of Toledo
(8615320) 
4:30 p.m.
Estimate on the singular set of heatflow problem for harmonic maps.
Xiaoxi Cheng*, Rice University
(8615829)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:20 p.m.
Special Session on Commutative Algebra, IV
Gold Eagle Suite C, University Union Building

2:00 p.m.
Powergenerated valuations.
K. Alan Loper*, Lawrence University
(86113209) 
2:30 p.m.
Hilbert functions and local cohomology.
Thomas Marley*, University of Nebraska, Lincoln
(86113172) 
3:00 p.m.
Onedimensional local rings of finite CohenMacaulay type.
Roger Wiegand*, University of Nebraska, Lincoln
(86113188) 
3:30 p.m.
Indecomposable modules over onedimensional local rings.
Roger Wiegand, University of Nebraska, Lincoln
Sylvia Wiegand*, University of Nebraska, Lincoln
(86113189) 
4:00 p.m.
Weakly Krull domains and the tclass groups.
D. D. Anderson, University of Iowa
E. G. Houston, University of North Carolina, Charlotte
M. Zafrullah*, Winthrop College
(86113210)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:50 p.m.
Special Session on Texas Topology and Geometry, IV
Room 410, University Union Building

2:00 p.m.
The Denjoy problem in two dimensions.
Alec Norton*, University of Texas, Austin
(8615831) 
2:30 p.m.
Topological properties of some attractors for cylinder maps.
R. Daniel Mauldin*, University of North Texas
(8615498) 
3:00 p.m.
Lattice invariants for sofic shifts.
Susan G. Williams*, University of South Alabama
(86154144) 
3:30 p.m.
The pYangMills equations.
Thomas Otway*, University of Texas, Austin
Karen Uhlenbeck, University of Texas, Austin
(8613597) 
4:00 p.m.
Growth rates and knots.
Daniel S. Silver*, University of South Alabama
(86157143) 
4:30 p.m.
The observation of saddle periodic orbits in physical systems.
Daniel P. Lathrop*, University of Texas, Austin
(86170148)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:50 p.m.
Special Session on Low Dimensional Topology, IV
Room 411, University Union Building

2:00 p.m.
Progress on the homotopy implies isotopy conjecture of laminated 3manifolds.
Will Kazez*, University of Georgia
Dave Gabai, California Institute of Technology
(86157200) 
2:30 p.m.
Knots yielding lens spaces.
John Berge*, University of Texas, Austin
(86157199) 
3:00 p.m.
Dehn surgery and spherical space forms.
Steven A. Bleiler*, Portland State University
Craig Hodgson, Columbia University
(8615762) 
3:30 p.m.
The calculus of curves immersed in surfaces.
J. Scott Carter*, University of South Alabama
(86157201) 
4:00 p.m.
The Reidemeister and Markov theorems in 3manifolds.
Paul Sundheim*, University of Texas, Austin
(8615761) 
4:30 p.m.
The cohopficity problem for 3manifold groups.
F. Gonz\'alezAcu\~na, Universidad Nacional Autonoma de Mexico
Wilbur Whitten*, Louisiana State University, Baton Rouge
(8615765)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.5:20 p.m.
Special Session on Representation Theory of Lie Groups, IV
Gold Eagle Suite A, University Union Building

2:00 p.m.
Invariant forms for subs and quotients of principal series.
Ray A. Kunze*, University of Georgia
(86122158) 
2:30 p.m.
Explicit realizations of unitarizable exceptional representations of real rank one semisimple Lie groups.
John E. Gilbert*, University of Texas, Austin
Christopher Meaney, Australian National University, Australia
(86122136) 
3:00 p.m.
Szego mappings into representations in cohomology.
Leticia Barchini*, State University of New York, Stony Brook
A. W. Knapp, State University of New York, Stony Brook
(86122161) 
3:30 p.m.
Kbifinite and Z(g)finite functions.
JingSong Huang*, University of Utah
(8612254) 
4:00 p.m.
Completely prime primitive ideals and quantization.
William McGovern*, University of Washington
(86117121) 
4:30 p.m.
Vogan's problem #3 and EnrightShelton theory.
Brian D. Boe*, University of Georgia
David H. Collingwood, University of Washington
(86122132) 
5:00 p.m.
Informal Discussion

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.5:20 p.m.
Special Session on Differential Equations, IV
Silver Eagle Suite C, University Union Building

2:00 p.m.
Flow in fractured porous media.
Jim Douglas, Jr.*, Purdue University, West Lafayette
(8617651) 
2:30 p.m.
An efficient RungeKutta (4,5) pair.
P. Bogacki, Old Dominion University
L. F. Shampine*, Southern Methodist University
(8613444) 
3:00 p.m.
Continuity of sets of optimal estimators for an output least squares estimation problem.
Luther White*, University of Oklahoma
(86135168) 
3:30 p.m.
Geometric algorithms for developable surfaces.
G. J. Fix*, University of Texas, Arlington
(86153175) 
4:00 p.m.
Stefan problem with convection.
John R. Cannon*, Lamar University
(8613548) 
4:30 p.m.
Vector valued test functions and elliptic systems.
Ruediger Landes*, University of Oklahoma
(86135131) 
5:00 p.m.
Study of a class of singular boundary value problems arising in heat transfer.
R. Kannan*, University of Texas, Arlington
(86134217)

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:20 p.m.
Special Session on Algebraic Geometry, IV
Room 418, University Union Building

2:00 p.m.
Spaces of rational functions on curves over finite fields.
Stephen A. DiPippo*, Brigham Young University
(86114174) 
2:30 p.m.
Embeddings of rational surfaces as CohenMacaulay varieties.
A. V. Geramita, Queen's University
A. Gimigliano, Universit\'a di Genova, Italy
B. Harbourne*, University of Nebraska, Lincoln
(86114159) 
3:00 p.m.
The arithmetic of the Jacobian of a Fermat curve.
William G. McCallum*, University of Arizona
(86114171) 
3:30 p.m.
Elliptic surfaces.
Peter F. Stiller*, Texas A\thsp\&\thsp M University, College Station
(86114195) 
4:00 p.m.
Informal Discussion

2:00 p.m.

Saturday November 3, 1990, 2:00 p.m.4:20 p.m.
Special Session on Several Complex Variables, III
Room 413, University Union Building

2:00 p.m.
Zeroes of the Szego kernel function.
Steve Bell*, Purdue University, West Lafayette
(8613237) 
2:30 p.m.
Characterizations of the unit ball and circular domains in C^n.
SoChin Chen*, State University of New York, Albany
(8613235) 
3:00 p.m.
Proper holomorphic mappings between domains in different dimensions.
Stephen A. Chiappari*, University of Illinois, UrbanaChampaign
(8613209) 
3:30 p.m.
FatouBieberbach domains.
John Erik Fornaess*, Princeton University
(86132146) 
4:00 p.m.
Complex structures on the tangent bundle of a Riemann manifold.
L\'aszl\'o Lempert*, Purdue University, West Lafayette
R\'obert Sz\"oke, University of Notre Dame
(8613236)

2:00 p.m.