AMS Sectional Meeting Program by Day
Current as of Tuesday, April 12, 2005 15:09:04
Eastern 1993 Spring Sectional Meeting
Washington, DC, April 1718, 1993
Meeting #881
Associate secretaries: Lesley M Sibner, AMS lsibner@duke.poly.edu
Sunday April 18, 1993

Sunday April 18, 1993, 8:20 a.m.10:50 a.m.
Special Session on Nonlinear Elliptic Problems in Geometry and Physics, III
Room 138, Douglass Hall

8:20 a.m.
The Dirichlet problem for a class of fully nonlinear elliptic equations.
Bo Guan*, Indiana University, Bloomington
(88135117) 
9:00 a.m.
On Weyl problem with nonnegative Gauss curvature.
Pengfei Guan*, McMaster University,
Yanyan Li, Rutgers University, New Brunswick
(8815828) 
9:40 a.m.
Numerical solutions of boundary value problems for Ksurfaces.
Frank Baginski*, George Washington University
Nate Whitaker, University of Massachusetts, Amherst
(8813579) 
10:20 a.m.
A nonminimal solution of the YangMillsHiggs equation with positive coupling constant.
Janet Talvacchia*, Swarthmore College
(88135220)

8:20 a.m.

Sunday April 18, 1993, 8:30 a.m.10:50 a.m.
Special Session on Pure and Applied Recursion Theory, III
Room 238, Douglass Hall

8:30 a.m.
(alpha,Beta)selective sets.
Georgia Martin*, University of Maryland, College Park
(8810312) 
9:00 a.m.
From recursive to online coloring of graphs.
Henry A. Kierstead*, Arizona State University
(8810356) 
9:30 a.m.
Pure and applied PI^0_1 classes.
Douglas Cenzer*, University of Florida
(8810347) 
10:00 a.m.
A cohesive degree which is not high.
Carl Jockusch*, University of Illinois, UrbanaChampaign
Frank Stephan, University of Karlsruhe, Germany
(8810371) 
10:30 a.m.
Jumps of minimal degrees below Q'.
Rod Downey, Victoria University of Wellington, New Zealand
Steffen Lempp, University of Wisconsin, Madison
Richard A. Shore*, Cornell University
(8810309)

8:30 a.m.

Sunday April 18, 1993, 8:30 a.m.10:50 a.m.
Special Session on Ergodic Theory, Dynamical Systems and Applications, III
Room 201, Douglass Hall

8:30 a.m.
Suspensions, inheritance, and flows on homogeneous spaces.
David B. Ellis*, Beloit College
(8815434) 
9:00 a.m.
Central configurations in the 1+n body problem.
Glen Hall*, Boston University
(88170160) 
9:30 a.m.
On the dynamics of some polynomial rootfinding algorithms.
Scott Sutherland*, State University of New York, Stony Brook
(8815835) 
10:00 a.m.
Residual properties of alphaflows.
Andres del Junco, University of Toronto,
Adam Fieldsteel*, Wesleyan University
KyeWon Park, Ajou University,
(88128113) 
10:30 a.m.
Entropy on noncompact spaces.
Bruce Kitchens*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(8812838)

8:30 a.m.

Sunday April 18, 1993, 8:30 a.m.10:50 a.m.
Special Session on Geometric Methods in Combinatorics, III
Room 105, Douglass Hall

8:30 a.m.
A poset of pseudoline arrangements.
Walter D. Morris, Jr.*, George Mason University
(8819022) 
9:00 a.m.
Gram's relation inside out.
Jim Lawrence*, George Mason University
(88152206) 
9:30 a.m.
Lattices and geometry.
M. K. Bennett*, University of Massachusetts, Amherst
(8810618) 
10:00 a.m.
Applications of combinatorial geometries in model theory.
Kitty L. Holland*, Simon Fraser University
(88103197) 
10:30 a.m.
The Borsuk conjecture holds for convex bodies with a belt of regular points.
Boris Dekster*, Mount Allison University
(8815211)

8:30 a.m.

Sunday April 18, 1993, 8:30 a.m.10:50 a.m.
Special Session on Low Dimensional Topology, III
Room 136, Douglass Hall

8:30 a.m.
A diagrammatic theory of knotted surfaces.
J. Scott Carter*, University of South Alabama
Masahico Saito, University of Texas, Austin
(8815760) 
9:00 a.m.
The formal KnizhnikZamolodchikov connection and a universal knot invariant.
XiaoSong Lin*, Columbia University
(8815762) 
9:30 a.m.
A topological quantum theory approach to the AndrewsCurtis conjecture.
Frank Quinn*, Virginia Polytechnic Institute and State University
(8815768) 
10:00 a.m.
Computing spectral flow via cup products.
Paul Kirk*, Florida State University
Eric Klassen, Indiana University, Bloomington
(88157211) 
10:30 a.m.
Infinite generation of PI_1(Diff(M)).
John Kalliongis*, Saint Louis University
Darryl McCullough, University of Oklahoma
(8815753)

8:30 a.m.

Sunday April 18, 1993, 8:30 a.m.10:40 a.m.
Session on Contributed Papers, III
Room 145, Douglass Hall

8:30 a.m.
The tangential structure of fractal measures.
Christoph Bandt*, ErnstMoritzArndt University, Germany
(88128215) 
8:45 a.m.
Discontinuous differential equations.
Abdelkader Boucherif*, Georgia Institute of Technology
Ghouti BoukliHacene, University of Tlemcen, Algeria
(88134166) 
9:00 a.m.
On a degenerate isotropic material.
Ping Wang*, Pennsylvania State University, Schuykill
(88135164) 
9:15 a.m.
The linear shallow water theory: A mathematical justification.
James A. Donaldson, Howard University
Daniel A. Williams*, Howard University
(88135165) 
9:30 a.m.
Solutions of physical problems by decomposition.
George Adomian*, General Analytics Corporation
(88135191) 
9:45 a.m.
Continuity of point derivations in Banach function algebras.
S. I. Ouzomgi*, Pennsylvania State University, University Park
(88146152) 
10:00 a.m.
A new class of Banach spaces.
Tepper L. Gill*, Howard University
W. W. Zachary, Howard University
(88146185) 
10:15 a.m.
An extension of a fixed point theorem.
S. P. Singh*, Memorial University of Newfoundland, Canada
(88147124) 
10:30 a.m.
Torsion relations in the spacetime tangent bundle.
Howard E. Brandt*, Army Research Labaoratory, Maryland
(88153133)

8:30 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Geodesic Flows, Hyperbolic Geometry, and Symbolic Dynamics, I
Room 237, Douglass Hall

9:00 a.m.
Markoff geodesics as matrices.
Harvey Cohn*, City College, City University of New York
(8811102) 
9:30 a.m.
Invariant measures for general Gauss transforms.
Andrew Haas*, University of Connecticut, Storrs
(88111199) 
10:00 a.m.
The continuous diophantine approximation mapping of Szekeres.
Jeffrey C. Lagarias*, AT&T Bell Laboratories, Murray Hill, New Jersey
Andrew D. Pollington, Brigham Young University
(88111142) 
10:30 a.m.
A rigidity theorem for surfaces of variable negative curvature.
Steven P. Lalley*, Purdue University, West Lafayette
(88153186)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Wavelets in Sampling Theory and Signal Processing, III
Room 223, Douglass Hall

9:00 a.m.
Sampling and the multisensor deconvolution problem.
David F. Walnut*, George Mason University
(88142120) 
9:30 a.m.
Wavelets on closed sets and applications.
Bj\"orn Jawerth*, University of South Carolina, Columbia
(88142212) 
10:00 a.m.
Scaleangle representation: Application to frequency extraction and sampling.
JP. Antoine, University Catholique de Louvain, Belgium
P. Carrette, University Catholique de Louvain, Belgium
R. Murenzi*, Clark Atlanta University
(88162168) 
10:30 a.m.
An almost orthogonal radial wavelet expansion for radial distributions.
Jay Epperson, University of New Mexico
Michael Frazier*, Michigan State University
(88141146)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Graph Theory, III
Room 216, Douglass Hall

9:00 a.m.
Rectilinear crossing number of a complete graph and Sylvester's "Four Point Problem" of geometric probabilty.
Edward R. Scheinerman*, Johns Hopkins University
Herbert S. Wilf, University of Pennsylvania
(8810557) 
9:30 a.m.
The Dinitz problem solved for rectangles.
Jeannette C. M. Janssen*, Lehigh University
(88105148) 
10:00 a.m.
On pintersection representations.
Nancy Eaton, University of Rhode Island
Ronald J. Gould*, Emory University
Vojtech Rodl, Emory University
(88105138) 
10:30 a.m.
Nowherezero 4flows of solvable Cayley graphs.
B. Alspach, Simon Fraser University
YP. Liu, Nanjing Normal, People's Republic of China
CQ Zhang*, West Virginia University
(8810531)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Undergraduate Research in Applied Mathematics, III
Room 205, Douglass Hall

9:00 a.m.
Consistency in cooperative game theory.
Roger Lee*, Cambridge, Massachusetts
(88190103) 
9:30 a.m.
Reasonable allocations for PFF and CFF games.
Luz E. Pinzon*, Rutgers University, New Brunswick
(8819094) 
10:00 a.m.
Compound Poisson approximations for word patterns.
Garrick Lee Wallstrom*, Abington, Massachusetts
Allison Michelle Skolnick, East Brunswick, New Jersey
(8816096) 
10:30 a.m.
Statistical tests for Markovdependence.
Sharyn Campbell*, Youngstown, Ohio
(88162111)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Undergraduate Research in Pure Mathematics, III
Room 204, Douglass Hall

9:00 a.m.
Some results in Euclidean plane geometry.
Nathan Dunfield*, Corvallis, Oregon
(8815191) 
9:30 a.m.
Factorization in K[x^2,x^3].
Faith Inman*, University of North Carolina, Greensboro
(8811690) 
10:00 a.m.
Unknotting numbers and minimal knot diagrams.
James A. Bernhard*, Princeton University
(88155105) 
10:30 a.m.
Mapping class groups of compact 2manifolds.
Dean Hildebrandt*, Harvard University
(8815589)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on Mathematics of Twodimensional Quantum Field Theory, III
Room 137, Douglass Hall

9:00 a.m.
Irreducible representations of affine superalgebras and number theory.
Victor Kac*, Massachusetts Institute of Technology
Minoru Wakimoto, Mie University, Japan
(88117175) 
9:40 a.m.
Representations of KacMoody algebras and quantum groups.
David Kazhdan*, Harvard University
George Lusztig, Massachusetts Institute of Technology
(88117178) 
10:20 a.m.
A qdeformation of Wakimoto representation and the quantum KnizhnikZamolodchikov equation.
Atsushi Matsuo*, Nagoya University, Japan
(88181176)

9:00 a.m.

Sunday April 18, 1993, 9:00 a.m.10:50 a.m.
Special Session on History of Mathematics, III
Room 103, Douglass Hall

9:00 a.m.
Calculus after the calculus.
Paul D. Scofield*, Washington & Lee University
(88101167) 
9:40 a.m.
Saint Vincent and the logarithm.
V. Frederick Rickey*, Bowling Green State University
(88101190) 
10:15 a.m.
Pascal's triangle and the solution of polynolmial equations.
Victor J. Katz*, University of the District of Columbia
(88101162)

9:00 a.m.

Sunday April 18, 1993, 9:30 a.m.10:50 a.m.
Special Session on Dilation and Interpolation: Operator Theoretic Methods, III
Room 133, Douglass Hall

9:30 a.m.
A Krein space extension of the CaratheodoryFejer problem.
Gene B. Christner*, University of Virginia
(8814750) 
10:00 a.m.
Julia operators and coefficient problems.
James Rovnyak*, University of Virginia
(8814751) 
10:30 a.m.
Operator theory and the Boselike oscillator.
Marvin Rosenblum*, University of Virginia
(88147161)

9:30 a.m.

Sunday April 18, 1993, 11:00 a.m.11:50 a.m.
Invited Address
On the existence of convex hypersurfaces of constant Gauss curvature in hyperbolic space.
Biology Greenhouse Auditorium, Just Hall
Joel Spruck*, Johns Hopkins University
(88153219) 
Sunday April 18, 1993, 1:30 p.m.2:20 p.m.
Invited Address
Geodesic flows and continued fractions.
Biology Greenhouse Auditorium, Just Hall
Leopold Flatto*, AT&T Bell Laboratories, Murray Hill, New Jersey
(88158129) 
Sunday April 18, 1993, 2:40 p.m.4:30 p.m.
Special Session on Geodesic Flows, Hyperbolic Geometry, and Symbolic Dynamics, II
Room 237, Douglass Hall

2:40 p.m.
Fricke groups and continued fractions.
David Steinbach*, Mathematical Sciences Research Institute, California
(88141192) 
3:10 p.m.
Symbolic dynamics and flow on the Hecke surfaces.
Thomas A. Schmidt*, Widener University
(8815883) 
3:40 p.m.
Intersections of closed geodesics on hyperbolic surfaces.
Thea Pignataro, City College, City University of New York
Hanna Sandler*, American University
(8815169) 
4:10 p.m.
betaTransformations and zeros for a class of power series.
Boris Solomyak*, University of Washington
(8815846)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.3:30 p.m.
Special Session on Wavelets in Sampling Theory and Signal Processing, IV
Room 223, Douglass Hall

Sunday April 18, 1993, 2:40 p.m.4:30 p.m.
Special Session on Graph Theory, IV
Room 216, Douglass Hall

2:40 p.m.
Maximal and forbidden unit distance graphs in the plane.
Carolyn R. Mahoney*, California State University, San Marcos
Kiran B. Chilakamarri, Central State University
(88105169) 
3:10 p.m.
Extreme values of the edgeneighborconnectivity.
Margaret B. Cozzens*, National Science Foundation, Washington, DC
ShuShih Yang Wu, Northeastern University
(88105184) 
3:40 p.m.
Sturdy networks.
Barry Piazza, University of Southern Mississippi
Fred Roberts*, Rutgers University, New Brunswick
Sam Stueckle, Northeastern University
(88105135) 
4:10 p.m.
Strongly connected mixed graphs and connected detachments of graphs.
C. St. J. A. NashWilliams*, University of Reading, England
(88105134)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.4:30 p.m.
Special Session on Undergraduate Research in Applied Mathematics, IV
Room 205, Douglass Hall

2:40 p.m.
Exotic curves on the Genus2 handlebody.
Michael Bolt*, Grand Rapids, Michigan
(88153100) 
3:10 p.m.
Counting critical points of polynomials.
Ian B. Robertson*, OCMR 1394, Oberlin, Ohio
(8812695) 
3:40 p.m.
An investigation of lifting modulo p as a method for computing Grobner bases.
William L. Cooper*, Philadelphia, Pennsylvania
Janine Ladick, Louisville, Kentucky
(8811287) 
4:10 p.m.
Computational methods for the Igusa local Zeta function.
Frederic Schoenberg*, Brown University
(8811188)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.5:00 p.m.
Special Session on Undergraduate Research in Pure Mathematics, IV
Room 204, Douglass Hall

2:40 p.m.
Upper bounds for covering numbers.
Sandra Thompson*, Minneapolis, Minnesota
Eric Vigoda, Rochester, New York
(88105104) 
3:10 p.m.
Randomly C_4decomposable graphs.
Daniel Isaksen*, Berkeley, California
(8810598) 
3:40 p.m.
Which Cayley graphs of prime power order are isomorphic?.
Andrew J. Mauer*, Williams College
(8810599) 
4:10 p.m.
Structural characteristics of V_n(G).
David Weinreich*, Emory University
(8810597) 
4:40 p.m.
Characterization of singular graphs.
Maryanne Brown*, Newton, Massachusetts
(88105101)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.4:00 p.m.
Special Session on Ergodic Theory, Dynamical Systems and Applications, IV
Room 201, Douglass Hall

2:40 p.m.
Factors of Cartesian products of nonsingular Chacon maps.
A. del Junco, University of Toronto
Cesar E. Silva*, Williams College
(88128141) 
3:10 p.m.
Remarks on ergodic transformations isomorphic to their inverses.
Geoffrey R. Goodson*, Towson State University
Daniel J. Rudolph, University of Maryland, College Park
(8812833) 
3:40 p.m.
Shadowing and global error of differential equations calculations.
Tim Sauer*, George Mason University
(8815843)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.5:10 p.m.
Special Session on Nonlinear Elliptic Problems in Geometry and Physics, IV
Room 138, Douglass Hall

2:40 p.m.
Adding handles to the helicoid.
David Hoffman*, University of Massachusetts, Amherst
Hermann Karcher, University of Bonn, Germany
Fusheng Wei, Texas A\thsp\&\thsp M University, College Station
(8815329) 
3:20 p.m.
The Dirichlet energy of mappings on spheres.
D. Zhang*, Johns Hopkins University
(8815382) 
4:00 p.m.
Regular homotopy classes of minimal surfaces.
Rob Kusner*, Institute for Advanced Study
Nick Schmitt, University of Massachusetts, Amherst
(8815327) 
4:40 p.m.
Nodal sets on Riemannian manifolds.
RuiTao Dong*, Johns Hopkins University
(88153121)

2:40 p.m.

Sunday April 18, 1993, 2:40 p.m.4:00 p.m.
Special Session on Low Dimensional Topology, IV
Room 136, Douglass Hall

2:40 p.m.
A subgroup of the mapping class group compatible with surgery.
Lawrence Smolinsky*, Louisiana State University, Baton Rouge
(8815765) 
3:10 p.m.
A simple proof of the Traczyk Yokota criteria for periodic knots.
J\'ozef H. Przytycki*, Odense University,
(8815745) 
3:40 p.m.
Minimal energy electrostatic knots.
Samuel J. Lomonaco, Jr.*, University of Maryland Baltimore County
(8817821)

2:40 p.m.

Sunday April 18, 1993, 2:45 p.m.4:35 p.m.
Special Session on Mathematics of Twodimensional Quantum Field Theory, IV
Room 137, Douglass Hall

2:45 p.m.
Introduction to Walgebras.
Kareljan Schoutens*, Joseph Henry Laboratories, Princeton University
(88181179) 
3:25 p.m.
Semiinfinite cohomology of Walgebras.
Peter Bouwknegt*, University of Southern California
(88181172) 
4:05 p.m.
Dilogarithm identities, qdifference equations, and the Virasoro algebra.
Edward Frenkel, Harvard University
Andras Szenes*, Massachusetts Institute of Technology
(88117181)

2:45 p.m.

Sunday April 18, 1993, 2:45 p.m.4:20 p.m.
Special Session on History of Mathematics, IV
Room 103, Douglass Hall

2:45 p.m.
Biographical remarks on the life and work of Joaquin Basilio Diaz.
Florence Fasanelli*, Mathematical Association of America
(8810184) 
3:20 p.m.
Calculus for a new century: Granville, Smith and Longley.
George M. Rosenstein*, Franklin & Marshall College
(8810126) 
3:50 p.m.
Thomas Jefferson's contributions to mathematics.
J. J. Tattersall*, Providence College
(8810163)

2:45 p.m.

Sunday April 18, 1993, 3:00 p.m.4:20 p.m.
Special Session on Pure and Applied Recursion Theory, IV
Room 238, Douglass Hall

3:00 p.m.
Using second order logic.
John N. Crossley*, Monash University, Australia
(88103154) 
3:30 p.m.
The two quantifier theory of the recursively enumerable weak truthtable degrees in decidable.
Klaus AmbosSpies, University of Heidelberg, Germany
Peter A. Fejer*, University of Massachusetts, Boston
Steffen Lempp, University of Wisconsin, Madison
Manuel Lerman, University of Connecticut, Storrs
(8810358) 
4:00 p.m.
Recent progress in priority theory.
K. Kontostathis*, Villanova University
(8810364)

3:00 p.m.