AMS Sectional Meeting Program by Day
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1991 Central Section Meeting
Fargo, ND, October 2526, 1991
Meeting #869
Associate secretaries:
Andy R Magid, AMS
amagid@ou.edu
Saturday October 26, 1991

Saturday October 26, 1991, 7:00 a.m.9:50 a.m.
Special Session on Commutative Algebra, III
Century Theater, Memorial Union

7:00 a.m.
Powers of ideals and rational surfaces.
Anthony V. Geramita*, Queen's University
(86914126)

7:30 a.m.
Wreath products and algebraic fundamental groups.
Shreeram S. Abhyankar*, Purdue University, West Lafayette
(8691403)

8:00 a.m.
Additive group actions on affine space.
David R. Finston*, New Mexico State University
James K. Deveney, Virginia Commonwealth University
(8691431)

8:30 a.m.
The cohomology of algebraic groups.
Robert M. Fossum*, University of Illinois, UrbanaChampaign
(8692094)

9:00 a.m.
When does a characteristic p surface singularity have trivial fundamental group?
Steven Dale Cutkosky, University of Missouri, Columbia
Hema Srinivasan*, University of Missouri, Columbia
(86913167)

9:30 a.m.
Some new Ktheoretic invariants for commutative rings.
Steven E. Landsburg*, Colorado State University
(86913139)

Saturday October 26, 1991, 7:00 a.m.9:50 a.m.
Special Session on Lorentz Transformations and Spacetime Geometry, III
Family Life Center, Room 320, Memorial Union

7:00 a.m.
Relativity on a 3manifold and generalized Lorentz matrices.
D. K. Sen*, University of Toronto
(8698326)

7:30 a.m.
Poisson structures on SL(n,c).
Richard Beals, Yale University
D. H. Sattinger*, University of Minnesota, Minneapolis
(8692259)

8:00 a.m.
Reflections on Lorentz's transformations of 1892.
Frank R. Tangherlini*, College of the Holy Cross
(8698314)

8:30 a.m.
Galilei covariant electromagnetic theory, nonrelativity of velocity, and the relativistic paradoxes.
Horst E. Wilhelm*, University of Utah
(86978154)

9:00 a.m.
A new approach to the Compton effect.
Dan Wilkins*, University of Nebraska, Omaha
(8698399)

9:30 a.m.
The particlewave dualism in quantum field theories as reflected in the dualism of the Galileiand Lorentz group.
F. Winterberg*, University of Nevada System, Reno, Nevada
(8698327)

Saturday October 26, 1991, 7:20 a.m.9:50 a.m.
Special Session on The Geometry of Equilibrium Configurations, III
Meadowlark Room, Memorial Union

7:20 a.m.
Driven rotating drops: The stability of the axisymmetric family of equilibria.
Frederic P. Brulois*, California State University, Dominguez Hills
(8694966)

8:00 a.m.
Green's identities and pendent liquid drops.
Robert Finn*, Stanford University
(86976163)

8:40 a.m.
Harmonic maps on hyperbolic spaces.
LuenFai Tam*, University of California, Irvine
(8695878)

9:20 a.m.
Upper bounds for eigenvalues of conformal metrics.
Nicholas Korevaar*, University of Utah
(86953148)

Saturday October 26, 1991, 7:30 a.m.9:50 a.m.
Special Session on Nonselfadjoint Operator Albebras, III
Peace Garden, Memorial Union

7:30 a.m.
Stability for commutative subspace lattices.
David R. Larson, Texas A\thsp\&\thsp M University, College Station
David R. Pitts*, University of Nebraska, Lincoln
(86947172)

8:00 a.m.
Mideals and operator algebras.
Timothy G. Feeman*, Villanova University
(86947124)

8:30 a.m.
Automorphism invariant ideals of nest algebras.
John L. Orr*, University of Nebraska, Lincoln
(86947150)

9:00 a.m.
On bimodules of nest subalgebras of von Neumann algebras.
Xingde Dai*, University of North Carolina, Charlotte
(8694798)

9:30 a.m.
Invariant ranges in von Neuman algebras.
Don Hadwin*, University of New Hampshire
(86947123)

Saturday October 26, 1991, 7:30 a.m.9:50 a.m.
Special Session on Multidimensional Complex Analysis and Operator Theory, III
Prairie Rose Room, Memorial Union

7:30 a.m.
Schatten ideal Hankel operators on weighted Bergman spaces on strongly pseudoconvex domains.
Marco M. Peloso*, Politecnico di Torino, Italy
(86947176)

8:00 a.m.
Toeplitz C*algebras on pseudoconvex domains with transverse symmetries.
Norberto Salinas*, University of Kansas
(86946156)

8:30 a.m.
Exhaustion of domains.
Akio Kodama, University of Toronto
Steven G. Krantz*, Washington University
Daowei Ma, University of Chicago
(8693201)

9:00 a.m.
Blaschke products in several complex variables.
John P. D'Angelo*, University of Illinois, UrbanaChampaign
(8693240)

9:30 a.m.
Degeneracy of the pairing between A^infinity and A^infinity.
David E. Barrett*, University of Michigan, Ann Arbor
(86932132)

Saturday October 26, 1991, 7:30 a.m.9:50 a.m.
Special Session on Graph Theory, III
Family Life Center, Room 124, Memorial Union

7:30 a.m.
Interval twostep graphs.
J. Richard Lundgren*, University of Colorado, Denver
Craig Rasmussen, University of Colorado, Denver
John S. Maybee, University of Colorado, Boulder
(8690572)

8:00 a.m.
New results and open problems in graph labelings.
Joseph A. Gallian*, University of Minnesota, Duluth
(8690597)

8:30 a.m.
Neighborhood unions and the cycle cover number of a graph.
Guantao Chen, Memphis State University
Ronald J. Gould, Emory University
Michael S. Jacobson*, University of Louisville
Richard H. Schelp, Memphis State University
(8690528)

9:00 a.m.
Balanced networks.
William Kocay*, University of Manitoba
Doug Stone, University of Manitoba
(8690577)

9:30 a.m.
Old and new problems in graph theory.
Paul Erd\"os*, Hungarian Academy of Science, Hungary
(86905125)

Saturday October 26, 1991, 8:00 a.m.9:50 a.m.
Special Session on Ergodic Theory, II
Family Life Center, Room 122, Memorial Union

8:00 a.m.
Uniform return times theorems for dynamical systems and helical transforms.
Idris Assani*, University of North Carolina, Chapel Hill
(8692887)

8:30 a.m.
Convergence and divergence of ergodic averages.
Roger L. Jones*, DePaul University
Mate Wierdl, University of North Carolina, Chapel Hill
(8692691)

9:00 a.m.
Quotients of actions with quasiinvariant measure.
Cesar Silva*, Williams College
Dave Witte, Williams College
(86928142)

9:30 a.m.
On mixing homogeneous spaces.
Arkady Tempelman*, Pennsylvania State University, University Park
(86947164)

Saturday October 26, 1991, 8:00 a.m.9:50 a.m.
Special Session on Algebraic Geometry, III
Dakota Ballroom, Memorial Union

8:00 a.m.
Set theoretic complete intersections in projective threespace.
David B. Jaffe*, University of Nebraska, Lincoln
(8691482)

8:30 a.m.
Surfaces in G(1,P^3).
Mark W. Gross*, University of Michigan, Ann Arbor
(8691430)

9:00 a.m.
Irreducibility of the Hilbert scheme of complex projective space curves.
Changho Keem*, Seoul National University, Korea
(8691439)

9:30 a.m.
On the Artin approximation theorem.
Mark Spivakovsky*, University of Toronto,
(8691348)

Saturday October 26, 1991, 8:00 a.m.9:25 a.m.
Special Session on Nonlinear Wave Equations, III
University Chamber, Memorial Union

8:00 a.m.
Blowup surfaces for a class of nonlinear wave equations.
Satyanad Kichenassamy, University of Minnesota, Minneapolis
Walter Littman*, University of Minnesota, Minneapolis
(86935117)

8:50 a.m.
Analyticity properties of multisolitons.
Satyanad Kichenassamy*, University of Minnesota, Minneapolis
(86935129)

Saturday October 26, 1991, 8:40 a.m.9:50 a.m.
Session on Geometry and Analysis
Badland Room, Memorial Union

8:40 a.m.
Triangular truncation and finding the norm of a Hadamard multiplier.
Carl C. Cowen, Purdue University, West Lafayette
James R. Angelos, Central Michigan University
Sivaram K. Narayan*, Purdue University
(8691570)

9:00 a.m.
Counterexamples to a conjecture for neutral equations.
Tibor Krisztin, Bolyai Institute, Hungary
R. M. Mathsen*, North Dakota State University
Xu Yuantong, Zhongshan University, China
(8693404)

9:20 a.m.
On the Gauss map of minimal surfaces immersed in R^n.
Min Ru*, National University of Singapore, Singapore
(8695373)

9:40 a.m.
Jensen's inequality for the Pettis integral: A characterization of the equality case.
Fr\'ed\'eric P. Brulois*, California State University, Dominguez Hills
(8694647)

Saturday October 26, 1991, 10:15 a.m.11:05 a.m.
Invited Address
Constant mean curvature immersions: A geometrical approach.
Century Theater, Memorial Union
Henry C. Wente*, University of Toledo
(86953137)

Saturday October 26, 1991, 12:30 p.m.1:20 p.m.
Invited Address
Prime ideals and decompositions of modules.
Century Theater, Memorial Union
Sylvia M. Wiegand*, University of Nebraska, Lincoln
(86913118)

Saturday October 26, 1991, 1:40 p.m.4:50 p.m.
Special Session on Nonselfadjoint Operator Albebras, IV
Peace Garden, Memorial Union

1:40 p.m.
Hereditary manifolds.
Jim Agler*, University of California at San Diego, La Jolla
(86947138)

2:30 p.m.
Triangular and semitriangular operators.
David R. Larson*, Texas A\thsp\&\thsp M University, College Station
(86946170)

3:00 p.m.
Invariant operator ranges and operator norm inequalities.
SingCheong Ong*, Central Michigan University
(86947119)

3:30 p.m.
An unusual CSL algebra.
John Daughtry*, East Carolina University
(8694707)

4:00 p.m.
Preduals of operator algebras on finite dimensional spaces.
Derek Westwood*, Wright State University, Dayton
(86946120)

4:30 p.m.
Operator algebras induced by Nagata's principle of idealization.
Alan Lambert*, University of North Carolina, Charlotte
Thomas G. Lucas, University of North Carolina, Charlotte
(8694742)

Saturday October 26, 1991, 2:00 p.m.4:50 p.m.
Special Session on Commutative Algebra, IV
Century Theater, Memorial Union

2:00 p.m.
Locally complete intersection homomorphisms and Quillen's conjecture on the finiteness of cotangent homology.
Luchezar L. Avramov*, Purdue University, West Lafayette
(8691355)

2:30 p.m.
Weyman's bicomplex and stable monomial ideals.
John A. Eagon*, University of Minnesota, Minneapolis
Joel Roberts, University of Minnesota, Minneapolis
(86913121)

3:00 p.m.
On computing standard bases.
Yonghao Ma*, University of Utah
(8691356)

3:30 p.m.
Sections of vector bundles over affine varieties.
Satya Mandal*, University of Kansas
(8691338)

4:00 p.m.
Serre's conjecture on intersection multiplicity.
S. P. Dutta*, University of Illinois, UrbanaChampaign
(86913159)

4:30 p.m.
Gorenstein properties of ring homomorphisms.
Luchezar L. Avramov, Purdue University, West Lafayette
HansBj\o rn Foxby*, Matematisk Institut, University of Copenhagen, Denmark
(86913115)

Saturday October 26, 1991, 2:00 p.m.3:20 p.m.
Special Session on Ergodic Theory, III
Family Life Center, Room 122, Memorial Union

2:00 p.m.
Using joinings to prove a generalization of the return time theorem.
Daniel Jay Rudolph*, University of Maryland, College Park
(86928100)

2:30 p.m.
Sequence entropy and mild mixing.
Qing Zhang*, Ohio State University, Columbus
(86928134)

3:00 p.m.
On complete convergence of moving averages.
M. B. Rao*, North Dakota State University, Fargo
(86928146)

Saturday October 26, 1991, 2:00 p.m.5:10 p.m.
Special Session on The Geometry of Equilibrium Configurations, IV
Meadowlark Room, Memorial Union

2:00 p.m.
Hypersurfaces with prescribed mean curvature in Riemannian spaces.
Ilya J. Bakelman*, Texas A\thsp\&\thsp M University, College Station
(86935140)

2:40 p.m.
Stability of liquid bridges between coaxial tubes.
Umadhar M. Patnaik*, University of Toledo
(86958136)

3:20 p.m.
The geometry and analysis of extremal maps.
S. Walter Wei*, University of Oklahoma
(86953153)

4:00 p.m.
Stability theorems for curves and application to the asymptotics of certain curvature flows.
Andrejs E. Treibergs*, University of Utah
(8695353)

4:40 p.m.
Problem Session

Saturday October 26, 1991, 2:00 p.m.4:50 p.m.
Special Session on Algebraic Geometry, IV
Dakota Ballroom, Memorial Union

2:00 p.m.
Colorings of planar maps and graph curves.
Rick Miranda*, Colorado State University
(8691449)

2:30 p.m.
A qexpansion principle for families of CalabiYau manifolds.
David R. Morrison*, Duke University
(86932155)

3:00 p.m.
Ideals as sections of projective modules.
M. P. Murthy*, University of Chicago
Satya Mandal, University of Kansas
(86913161)

3:30 p.m.
Varieties with universal zeta functions.
Diane Meuser*, Boston University
(86911152)

4:00 p.m.
Microlocal characterization of quasihomogeneous singularities.
Stephen S.T. Yau*, University of Illinois at Chicago
(8691474)

4:30 p.m.
Twisted exponential sums and slopes of Frobenius for generalized hypergeometric functions.
Alan Adolphson, Oklahoma State University, Stillwater
Steven Sperber*, University of Minnesota, Minneapolis
(86914135)

Saturday October 26, 1991, 2:00 p.m.4:50 p.m.
Special Session on Multidimensional Complex Analysis and Operator Theory, IV
Prairie Rose Room, Memorial Union

2:00 p.m.
Spectral properties of essentially normal Bergman pairs.
Raul E. Curto*, University of Iowa
(86947113)

2:30 p.m.
Spectra of some composition operators.
Barbara D. MacCluer*, University of Richmond
Carl C. Cowen, Purdue University, West Lafayette
(8694725)

3:00 p.m.
Index theorems for Ginvariant transversally elliptic operators.
Jeffrey Fox, State University of New York, Albany and University of Colorado, Boulder
Peter Haskell*, Virginia Polytechnic Institute and State University
(8694629)

3:30 p.m.
Exttheory for smooth algebras.
Xiaolu Wang*, University of Maryland, College Park
(8694783)

4:00 p.m.
Toeplitz algebras and Riemannian flows.
Efton Park*, Indiana UniversityPurdue University, Indianapolis
(8694789)

4:30 p.m.
Secondary characteristic classes and leafwise Toeplitz operators.
Jerome Kaminker*, Indiana UniversityPurdue University, Indianapolis
(86947181)

Saturday October 26, 1991, 2:00 p.m.4:20 p.m.
Special Session on Graph Theory, IV
Family Life Center, Room 124, Memorial Union

2:00 p.m.
My favorite problems in Ramsey theory.
R. L. Graham*, AT&T Bell Laboratories, Murray Hill, New Jersey
(8690560)

2:30 p.m.
Graphs with Linearly bounded Ramsey numbers.
Guantao Chen, Memphis State University
R. H. Schelp*, Memphis State University
(8690561)

3:00 p.m.
Methods for evolving useful graphs.
Geoffrey Exoo*, Indiana State University
(86905165)

3:30 p.m.
Subgraphs of a hypercube containing no small even cycles.
Fan R. K. Chung*, Bellcore, Morristown, New Jersey
(86905160)

4:00 p.m.
Path pariable graphs.
Ralph Faudree*, Memphis State University
(8690551)

Saturday October 26, 1991, 2:00 p.m.4:50 p.m.
Special Session on Constrained Approximation, Theory and Algorithms, II
Family Life Center, Room 319, Memorial Union

2:00 p.m.
Constrained approximation at IMSL.
Philip Smith*, International Mathematical Statistics Library Incorporated, Houston, Texas
(86941107)

2:30 p.m.
The Newton method for convex regression, data smoothing, and quadratic programming with bounded constraints.
Wu Li, Old Dominion University
John Swetits*, Old Dominion University
(86941108)

3:00 p.m.
Estimation and approximation using infinite dimensional convex programs with entropy type objectives.
Jonathan M. Borwein*, University of Waterloo
(8699032)

3:30 p.m.
A convex programming approach to constrained approximation.
Jon Borwein, University of Waterloo
Adrian Lewis*, University of Waterloo
(8694945)

4:00 p.m.
Active set algorithms for isotonic regression.
Michael J. Best*, University of Waterloo
(86949104)

4:30 p.m.
Generalized convex functions and best L_p approximation.
Ronald M. Mathsen, North Dakota State University, Fargo
Vasant A. Ubhaya*, North Dakota State University, Fargo
(86941103)

Saturday October 26, 1991, 2:00 p.m.2:50 p.m.
Special Session on Lorentz Transformations and Spacetime Geometry, IV
Family Life Center, Room 320, Memorial Union

2:00 p.m.
Informal Discussion

2:30 p.m.
Leftinvariant Lorentzian metrics on 3dimensional lie groups
Phillip E. Parker*, Wichita State University
(8695381)
Inquiries: meet@ams.org