
AMS Sectional Meeting Full Program
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Program 
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Inquiries: meet@ams.org
1991 Western Section Meeting
Santa Barbara, CA, November 910, 1991
Meeting #870
Associate secretaries: Lance W Small, AMS lwsmall@ucsd.edu
Saturday November 9, 1991

Saturday November 9, 1991, 7:30 a.m.9:50 a.m.
Special Session on Knotting Phenomena in the Natural Sciences, I
ROOM 2115, Girvetz Hall

7:30 a.m.
Knot generation, identification and enumeration.
Kenneth C. Millett*, University of California, Santa Barbara
(8705770)

8:00 a.m.
Spiral waves in oscillating reactions.
De Witt L. Sumners*, Florida State University
(8709245)

8:30 a.m.
Thickness of knots.
Jonathan K. Simon*, University of Iowa
(8705767)

9:00 a.m.
On the energy of knots.
Michael H. Freedman*, University of California at San Diego, La Jolla
(8705766)

9:30 a.m.
The groundstate energy function of a knot.
H. K. Moffatt*, University of Cambridge, England
(8705768)

Saturday November 9, 1991, 8:00 a.m.9:50 a.m.
Special Session on Applied Probability, 1
ROOM 1115, Girvetz Hall

8:00 a.m.
Catalytic surfacereaction models.
Maury Bramson, University of Wisconsin, Madison
Claudia Neuhauser*, University of Southern California
(8706036)

8:30 a.m.
Internal and external monotonicity properties of marked point processes.
Moshe Shaked, University of Arizona
J. George Shanthikumar*, University of California, Berkeley
(8706077)

9:00 a.m.
On the rate of convergence in Stein's method.
Yosef Rinott*, University of California at San Diego, La Jolla
(8706029)

9:30 a.m.
The MongeKantorovich masstransportation problem.
Svetlozar T. Rachev*, University of California, Santa Barbara
(8706002)

Saturday November 9, 1991, 8:00 a.m.9:50 a.m.
Special Session on Noncommutative Homological Algebra, I
ROOM 1116, Girvetz Hall

8:00 a.m.
Projective resolutions.
Edward L. Green*, Virginia Polytechnic Institute and State University
(8701674)

8:30 a.m.
Finitistic dimensions of fixed rings. I.
Ellen Kirkman*, Wake Forest University
James Kuzmanovich, Wake Forest University
(8701647)

9:00 a.m.
Finistic dimensions of fixed rings. II.
Ellen E. Kirkman, Wake Forest University
James Kuzmanovich*, Wake Forest University
(8701648)

9:30 a.m.
Global dimension of rings of differential operators on projective varieties.
Brad Shelton*, University of Oregon
(8701675)

Saturday November 9, 1991, 8:00 a.m.9:50 a.m.
Special Session on Quadratic Forms, I
ROOM 1119, Girvetz Hall

8:00 a.m.
Distribution of genera of integral quadratic forms among rational classes.
Andrew G. Earnest*, Southern Illinois University, Carbondale
(8701142)

8:30 a.m.
Recent results and problems in quadratic forms.
Shmuel Friedland*, University of Illinois, Chicago
(8701144)

9:00 a.m.
Positive definite Zlattices defined by finite groups.
Alexander J. Hahn*, University of Notre Dame
(8701138)

9:30 a.m.
Some problems in integral quadratic forms.
J. S. Hsia*, Ohio State University, Columbus
(8701110)

Saturday November 9, 1991, 8:00 a.m.9:50 a.m.
Session on Analysis
ROOM 2116, Girvetz Hall

8:00 a.m.
Markov finite approximations of Markov operators.
Jiu Ding*, University of Southern Mississippi
(8704109)

8:20 a.m.
Obtuse convex cones in a Hilbert space.
Fr\'ed\'eric P. Brulois*, California State University, Dominguez Hills
(8704613)

8:40 a.m.
Differential equations in the spectral parameter, Darboux transformations and a heirarchy of master symmetries for KdV.
Jorge P. Zubelli*, University of California, Santa Barbara
Franco Magri, University of Milano, Italy
(8703525)

9:00 a.m.
Integral points of P^n{2n+1 hyperplanes in general position}.
Min Ru*, National University of Singapore, Singapore and University of Notre Dame
PitMann Wong, University of Notre Dame
(8701432)

9:20 a.m.
The mountain impasse theorem.
Kyril Tintarev*, University of California, Irvine
(8703589)

9:40 a.m.
Noncharacteristic embeddings of the ndimensional torus in the (n+2)dimensional torus.
David Miller*, Swarthmore College
(8705721)

Saturday November 9, 1991, 1:15 p.m.2:05 p.m.
Invited Address
Knot theory, SL_2C and Newton polygons.
ROOM 1004, Girvetz Hall
Daryl Cooper*, University of California, Santa Barbara
(8705757)

Saturday November 9, 1991, 2:15 p.m.5:05 p.m.
Special Session on Low Dimensional Topology and Negatively Curved Groups, I
ROOM 1112, Girvetz Hall

2:15 p.m.
Dehn filling hyperbolic 3manifolds.
Colin Adams*, Williams College
(8705728)

2:45 p.m.
Nonnegatively curved Dehn fillings.
Steven Bleiler*, Portland State University
Craig Hodgson, University of Melbourne, Australia
(8705790)

3:15 p.m.
Volumes of hyperbolic Haken manifolds.
Marc Culler*, University of Illinois, Chicago
(8705165)

3:45 p.m.
Restricted Gromov groups and amalgams.
Benjamin Fine*, Fairfield University
Gerhard Rosenberger, University of Dortmund, Germany
(8702020)

4:15 p.m.
A covering invariant of graph manifolds.
Shicheng Wang, Beijing University, People's Republic of China
YingQing Wu*, University of California, Santa Barbara
(8705773)

4:45 p.m.
Higher order Arf invariants for surfaces embedded in R^3.
Fred Hickling*, Santa Clara University
(8705714)

Saturday November 9, 1991, 2:15 p.m.4:05 p.m.
Special Session on Applied Probability, II
ROOM 1115, Girvetz Hall

2:15 p.m.
Brownian models of multiclass queueing networks.
Ruth J. Williams*, University of California at San Diego, La Jolla
(8706018)

2:45 p.m.
Schurconcave survival functions and survival analysis.
Richard E. Barlow*, University of California, Berkeley
Fabio Spizzichino, University of Rome, Italy
(8706056)

3:15 p.m.
Tagged particles and singularities in selforganizing systems.
J. M. Carlson, University of California, Santa Barbara
E. R. Grannan, AT&T Bell Laboratories, Murray Hill, New Jersey
G. H. Swindle*, University of California, Santa Barbara
(8706063)

3:45 p.m.
Phase transitions for the score in matching random sequences.
Michael S. Waterman*, University of Southern California
Richard Arratia, University of Southern California
(8706008)

Saturday November 9, 1991, 2:15 p.m.4:35 p.m.
Special Session on Noncommutative Homological Algebra, II
ROOM 1116, Girvetz Hall

2:15 p.m.
Schur's double centralizer theorem: A Hopf algebra approach, and related questions.
Davida Fischman*, University of Southern California
(8701649)

2:45 p.m.
Nilpotent elements in a Grothendieck ring.
Robert M. Guralnick*, University of Southern California, Los Angeles
(8701615)

3:15 p.m.
Simple Noetherian domains as fixed rings.
R. Guralnick, University of Southern California
M. Susan Montgomery*, University of Southern California
(8701616)

3:45 p.m.
The exchange property for quasicontinuous modules.
Saad H. Mohamed, Kuwait University, Kuwait
Bruno J. Mueller*, McMaster University
(8701606)

4:15 p.m.
Cocommutative Hopf algebra actions and the Connes spectrum.
James Osterburg, University of Cincinnati
Declan Quinn*, Syracuse University
(8701655)

Saturday November 9, 1991, 2:15 p.m.5:05 p.m.
Special Session on Quadratic Forms, II
ROOM 1119, Girvetz Hall

2:15 p.m.
On primitive spinor exceptional representations by ternary quadratic forms.
David C. Hung*, State University of New York, Binghamton
(8701143)

2:45 p.m.
Representations by indefinite unimodular lattices.
Donald G. James*, Pennsylvania State University, University Park
(8701105)

3:15 p.m.
A structure theorem for a pair of quadratic forms.
Youyu Shao*, Ohio State University, Columbus
(8701135)

3:45 p.m.
Minimal norm Jordan splitting in dyadic local fields.
Fei Xu*, Ohio State University, Columbus
(8701111)

4:15 p.m.
Integral quadratic forms and Enriques surfaces.
V. V. Nikulin*, Steklov Mathematical Institute, USSR and University of Notre Dame
(8701162)

4:45 p.m.
Some arithmetic relations on the representation numbers of quadratic forms.
Lynne H. Walling*, University of Colorado, Boulder
(8701122)

Saturday November 9, 1991, 2:15 p.m.5:05 p.m.
Special Session on Knotting Phenomena in the Natural Sciences, II
ROOM 2115, Girvetz Hall

2:15 p.m.
Dilation factors for braided links.
Jer\^ome E. Los*, University de Nice, France and University of California, Santa Barbara
(8705407)

2:45 p.m.
Knots and braids in dynamical systems.
Robert F. Williams*, University of Texas, Austin
(8703427)

3:15 p.m.
Replication and recombination knots in DNA.
Sylvia Spengler*, Lawrence Berkeley Laboratory, California
(8705791)

3:45 p.m.
Polynomial invariants of links and the structure of recombination.
Louis H. Kauffman*, University of Illinois, Chicago
(8705519)

4:15 p.m.
Surgery on cusp neighborhoods.
Ronald J. Stern*, University of California, Irvine
(8705769)

4:45 p.m.
Which automorphisms of complete graphs are realizable in 3space?
Erica Flapan*, Pomona College
(8705731)

Saturday November 9, 1991, 2:15 p.m.4:25 p.m.
Contributed Paper Session
ROOM 2116, Girvetz Hall
Sunday November 10, 1991

Sunday November 10, 1991, 7:30 a.m.9:50 a.m.
Special Session on Applied Probability, III
ROOM 1115, Girvetz Hall

7:30 a.m.
Finite clusters in continuous percolation.
Kenneth S. Alexander*, University of Southern California
(8706054)

8:00 a.m.
Longrange percolation.
Mathew D. Penrose*, University of California, Santa Barbara
(8706023)

8:30 a.m.
Functional discrete limit theorems for random mappings.
R. Arratia, University of Southern California
S. Tavar\'e*, University of Southern California
(8706064)

9:00 a.m.
The inverse problem for phasetype distributions.
Robert S. Maier*, University of Arizona
(8706072)

9:30 a.m.
Logistic and semilogistic processes.
Barry C. Arnold*, University of California, Riverside
(8706080)

Sunday November 10, 1991, 7:30 a.m.9:50 a.m.
Special Session on Knotting Phenomena in the Natural Sciences, III
ROOM 2115, Girvetz Hall

7:30 a.m.
3manifolds and 2complexes: Some recent results.
Dale Rolfsen*, University of British Columbia
(8705771)

8:00 a.m.
Simple balanced categories and invariants of tangles and 3manifolds.
Nicolai Reshetikhin*, University of California, Berkeley
(8705785)

8:30 a.m.
The quantum G_2 link invariant.
Greg Kuperberg*, University of California, Berkeley
(8705761)

9:00 a.m.
Applications of the spectral parameter tangle of V. Jones.
J\'ozef H. Przytycki*, University of California, Riverside and Warsaw University, Poland
(8705776)

9:30 a.m.
Alexander invariants.
Hubert Saleur*, Yale University
(8705786)

Sunday November 10, 1991, 8:00 a.m.9:50 a.m.
Special Session on Low Dimensional Topology and Negatively Curved Groups, II
ROOM 1112, Girvetz Hall

8:00 a.m.
Counting incompressible surfaces in hyperbolic 3manifolds.
Joel Hass*, University of California, Davis
(8705758)

8:30 a.m.
Local rigidity and Dehn surgery space.
Steve Kerckhoff*, Stanford University
(8705346)

9:00 a.m.
Weak concentration points for Kleinian groups.
Darryl McCullough*, University of Oklahoma
(8702026)

9:30 a.m.
Measured laminations for nonnegatively curved groups.
Lee D. Mosher*, Rutgers University, Newark
Ulrich Oertel, Rutgers University, Newark
(8705793)

Sunday November 10, 1991, 8:00 a.m.9:20 a.m.
Special Session on Noncommutative Homological Algebra, III
ROOM 1116, Girvetz Hall

8:00 a.m.
Noncommutative characteristic polynomials.
Hyman Bass*, Columbia University
(8701682)

8:30 a.m.
Dixmier's conjecture for the first Weyl algebra.
C. A. Dean*, University of Michigan, Ann Arbor
J. W. Kerr, Michigan State University
(8701692)

9:00 a.m.
Induced bimodules, annihilator primes, and `lying over'.
Edward S. Letzter*, University of Utah
(8701650)

Sunday November 10, 1991, 8:00 a.m.9:50 a.m.
Special Session on Quadratic Forms, III
ROOM 1119, Girvetz Hall

8:00 a.m.
Spherical geometry and sphere packingsKelper's conjecture and beyond.
WuYi Hsiang*, University of California, Berkeley
(8705181)

8:30 a.m.
Eigenvalues of symmetric integer matrices.
Dennis R. Estes*, University of Southern California
(8701140)

9:00 a.m.
Weak *orderings on *fields.
K. H. Leung*, National University of Singapore, Republic of Singapore
(8701201)

9:30 a.m.
Formal groups and Dirichlet Lfunctions.
Nancy Childress*, Arizona State University
Jeff Stopple, University of California, Santa Barbara
(8701241)

Sunday November 10, 1991, 10:00 a.m.10:50 a.m.
Invited Address

Sunday November 10, 1991, 1:00 p.m.1:50 p.m.
Invited Address
Invariants and the algebraic theory of quadratic forms.
ROOM 1004, Girvetz Hall
Richard S. Elman*, University of California, Los Angeles
(8701130)

Sunday November 10, 1991, 2:00 p.m.4:20 p.m.
Special Session on Low Dimensional Topology and Negatively Curved Groups, III
ROOM 1112, Girvetz Hall

2:00 p.m.
Heegaard splittings of compact orientable product manifolds.
Jennifer Schultens*, University of California, Santa Barbara
(8705734)

2:30 p.m.
The Tait flyping conjecture.
William Menasco, State University of New York, Buffalo
Morwen Thistlethwaite*, University of Tennessee, Knoxville
(8705759)

3:00 p.m.
Deforming hyperbolic 3manifolds.
Walter D. Neumann, Ohio State University, Columbus
Alan W. Reid*, University of Aberdeen, Scotland and Ohio State University
(8705751)

3:30 p.m.
Length functions and outer space.
John Smillie, Cornell University
Karen Vogtmann*, Cornell University
(8702060)

4:00 p.m.
Quasiisometries. and bicombings.
HsuehLing Huynh, University of California, Berkeley
Wing Yew Poon*, University of California, Berkeley
(8702017)

Sunday November 10, 1991, 2:00 p.m.3:50 p.m.
Special Session on Applied Probability, IV
ROOM 1115, Girvetz Hall

2:00 p.m.
Convergence of some partially parallel Gibbs samplers with annealing.
Roberto H. Schonmann*, University of California, Los Angeles
(8706004)

2:30 p.m.
Stationary Poisson sequences.
Aaron M. Gross*, University of California, Santa Barbara
James B. Robertson, University of California, Santa Barbara
(8706024)

3:00 p.m.
Some results on Poisson approximation.
Anant P. Godbole*, Michigan Technological University
(8706079)

3:30 p.m.
Taylor series solution of the M/M/1 queueing system.
Alan Krinik*, California State Polytechnic University
(8706003)

Sunday November 10, 1991, 2:00 p.m.3:20 p.m.
Special Session on Quadratic Forms, IV
ROOM 1119, Girvetz Hall

2:00 p.m.
Noncommutative prufer rings.
Patrick J. Morandi*, New Mexico State University, Las Cruces
(8701639)

2:30 p.m.
Constructions of valued division algebras.
Al Sethuraman*, California State University, Northridge
(8701633)

3:00 p.m.
Q(i)division rings and admissibility.
Steven G. Liedahl*, University of California, Los Angeles
(8701237)
Inquiries: meet@ams.org

