AMS Sectional Meeting Full Program
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1996 Spring Eastern Sectional Meeting
New York, NY, April 1314, 1996
Meeting #910
Associate secretaries:
Lesley M Sibner, AMS
lsibner@duke.poly.edu
Saturday April 13, 1996

Saturday April 13, 1996, 8:00 a.m.4:00 p.m.
Book Sale and Electronic Products

Saturday April 13, 1996, 8:00 a.m.4:00 p.m.
Meetings Registration
Lobby, Courant Institute Building

Saturday April 13, 1996, 8:30 a.m.10:50 a.m.
Special Session on Hyperbolic Geometry and Discrete Groups, I
Room 632, Shimkin Hall
Organizers:
Jane P. Gilman, Rutgers University, Newark

8:30 a.m.
A discreteness criteria with applications to small volumes.
Frederick W. Gehring, University of Michigan, Ann Arbor
Colin Maclachlan, University of Aberdeen, United Kingdom
Gaven John Martin, University of Auckland, New Zealand
Alan W. Reid*, University of Texas, Austin
(9105792)

9:00 a.m.
Invariants for $n$dimensional M\"obius groups.
Chun Cao, University of Michigan, Ann Arbor
Peter L. Waterman*, Northern Illinois University
(91030118)

9:30 a.m.
Discreteness conditions for $n$dimensional M\"obius groups.
Chun Cao*, University of Michigan, Ann Arbor
Peter L. Waterman, Northern Illinois University
(91030121)

10:00 a.m.
Discrete subgroups of $SL_n({\Bbb R})$ generated by lattices in opposite horospherical subgroups.
Hee Oh*, Yale University
(91030140)

10:30 a.m.
Are homotopy hyperbolic $3$manifolds hyperbolic?
Robert Meyerhoff*, Boston College
David Gabai, California Institute of Technology
Nathaniel John Thurston, University of California, Berkeley
(9105781)

Saturday April 13, 1996, 8:30 a.m.10:20 a.m.
Special Session on Gauge Field Theory, I
Room 626, Shimkin Hall
Organizers:
Janet C. Talvacchia, Swarthmore College
Yisong Yang, Polytechnic University

8:30 a.m.
Nonquadratic YangMills energies.
Thomas H. Otway*, Yeshiva University
(9103532)

9:00 a.m.
Existence of hyperbolic monopoles.
Lesley M. Sibner*, Polytechnic University
Robert J. Sibner, Brooklyn College, City University of New York
(9103528)

9:30 a.m.
A MayerVietoris principle for monopoles.
Eugene A. Durenard*, Saloman Brothers, United Kingdom
(9105886)

10:00 a.m.
Renormalized energy for GinzburgLandau vortices on closed surfaces.
Jie Qing*, Columbia University
(9105371)

Saturday April 13, 1996, 8:30 a.m.10:20 a.m.
Special Session on Stochastic Models in Mathematical Finance, I
Room 109, Warren Weaver Hall
Organizers:
Thaleia Zariphopoulou, University of Wisconsin, Madison

8:30 a.m.
Efficient trees for option valuation.
David C. Heath*, Cornell University
(9103516)

9:00 a.m.
Optimal investment processes for utility maximization problems with restricted information.
Peter Lakner*, Courant Institute of Mathematical Sciences, New York University
(9103508)

9:30 a.m.
Optimal consumption and investment when investment opportunities are better for the rich than for the poor.
Hyeng Keun Koo*, University of Wisconsin, Madison
Thaleia Zariphopoulou, University of Wisconsin, Madison
(9106043)

10:00 a.m.
Some probabilistic approaches to pricing and hedging multiassets and pathdependent options.
Helyette E. Geman*, ESSEC Finance Department, CergyPontoise, France
(9106046)

Saturday April 13, 1996, 8:40 a.m.10:50 a.m.
Special Session on Differential Algebra, I
Room 634, Shimkin Hall
Organizers:
Phyllis J. Cassidy, Smith College
William F. Keigher, Rutgers University, Newark
Michael F. Singer, North Carolina State University

8:40 a.m.
Lie algebras of derivation operators in the context of differential algebra.
Phyllis J. Cassidy*, Smith College
(91012111)

9:15 a.m.
The symbolic computation of differential invariants using trees.
Robert Grossman*, University of Illinois, Chicago
(91017123)

9:50 a.m.
Differentally homogenous differential polynomials.
Georg Martin Reinhart*, Wellesley College
(9101279)

10:25 a.m.
An arithmetic analogue of differential algebra.
Alexandru Buium*, University of New Mexico
(9101139)

Saturday April 13, 1996, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, I
Room 101, Warren Weaver Hall
Organizers:
Patricia E. Bauman, Purdue University, West Lafayette
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
Peter J. Sternberg, Indiana University, Bloomington

9:00 a.m.
Some inequalities for second order elliptic equations and applications.
Louis Nirenberg*, Courant Institute of Mathematical Sciences, New York University
(91035108)

9:40 a.m.
Fast/slow diffusion and nonlocal geometric motion.
Lawrence Craig Evans, University of California, Berkeley
Mikhail Feldman*, University of Pennsylvania
Ronald F. Gariepy, University of Kentucky
(9103552)

10:20 a.m.
The singular limit of a vectorvalued reactiondiffusion process.
Lia Bronsard*, McMaster University
Barbara Stoth, University of Bonn, Germany
(9103536)

Saturday April 13, 1996, 9:00 a.m.10:50 a.m.
Special Session on Global Riemannian Geometry, I
Room 102, Warren Weaver Hall
Organizers:
Tobias H. Colding, Courant Institute of Mathematical Sciences, New York University
Claude R. LeBrun, State University of New York, Stony Brook
Santiago R. Simanca, Polytechnic University

9:00 a.m.
Sufficiently collapsed manifolds with bounded curvature and diameter have minimal volume zero.
Jeff Cheeger*, Courant Institute of Mathematical Sciences, New York University
(9105373)

9:30 a.m.
Minimal volume and finiteness theorems for manifolds with Gromov's hyberbolicity.
Jianguo Cao*, Cornell University
(9105324)

10:00 a.m.
On function theory on spaces with a lower Ricci curvature bound. {\rm II}.
Tobias H. Colding, Courant Institute of Mathematical Sciences, New York University
William P. Minicozzi, II*, Johns Hopkins University
(9105878)

10:30 a.m.
Metric constraints on exotic spheres via Alexandrov geometry.
K. Grove, University of Maryland, College Park
Frederick H. Wilhelm, Jr.*, State University of New York, Stony Brook
(9105350)

Saturday April 13, 1996, 9:00 a.m.10:50 a.m.
Special Session on Number Theory, I
Room 613, Warren Weaver Hall
Organizers:
William D. Duke, Rutgers University, New Brunswick
Ze'ev Rudnick, Tel Aviv University, Israel

9:00 a.m.
Estimates for Artin $L$functions of degree two.
John B. Friedlander, University of Toronto
Henryk Iwaniec*, Rutgers University, New Brunswick
William D. Duke, Rutgers University, New Brunswick
(9101197)

9:40 a.m.
Bounds for the TateShafarevich group.
Dorian Goldfeld*, Columbia University
Daniel B. Lieman, Columbia University
(91011136)

10:20 a.m.
On the variation of argument of MaassHecke $L$functions.
Dennis A. Hejhal, Uppsala University, Sweden
Wenzhi Luo*, Princeton University
(9101131)

Saturday April 13, 1996, 9:00 a.m.10:30 a.m.
Panel Discussion
The Activities of the International Mathematical Union and Plans for the International Congress of Mathematicans in 1998.
Room 1302, Warren Weaver Hall
Panelists:
David Mumford, President, IMU
Jacob Palis, Secetary, IMU
Phillip A. Griffiths, Chairman, Program Committee, ICM 98
Martin Groetschel, President, Organizing Committee, ICM 98
Jeremy Kilpatrick, Vice President, ICMI
Herbert Clemens, Member Executive Committee, CDE

Saturday April 13, 1996, 9:30 a.m.10:50 a.m.
Special Session on Topological Methods, I
Room 813, Warren Weaver Hall
Organizers:
Charles R. Traina, Saint John's University
Lawrence Narici, Saint John's University
Edward Beckenstein, Saint John's University

9:30 a.m.
A new look at biseparating maps, {\rm I}.
Melvin Henriksen*, Harvey Mudd College
(9100655)

10:10 a.m.
Informal discussion

Saturday April 13, 1996, 11:00 a.m.11:50 a.m.
Invited Address
Assessing the empirical performance of continuous time methods in finance.
Room 109, Warren Weaver Hall
Jose Scheinkman*, University of Chicago
(9109003)

Saturday April 13, 1996, 1:30 p.m.2:20 p.m.
Invited Address
On $4$dimensional Einstein manifolds.
Room 109, Warren Weaver Hall
Claude R. LeBrun*, State University of New York, Stony Brook
(9105301)

Saturday April 13, 1996, 2:30 p.m.5:00 p.m.
Special Session on Partial Differential Equations, II
Room 101, Warren Weaver Hall
Organizers:
Patricia E. Bauman, Purdue University, West Lafayette
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
Peter J. Sternberg, Indiana University, Bloomington

2:30 p.m.
Dynamics of GinzburgLandau vortices.
H. Mete Soner*, Carnegie Mellon University
Robert Jerrard, Carnegie Mellon University
(9103515)

3:10 p.m.
Constraints on formation of singularities for the small disturbance transonic flow equations.
Irene Martinez Gamba*, Courant Institute of Mathematical Sciences, New York University
(91035128)

3:50 p.m.
Travelling fronts in cylinders and their stability.
Jerrold W. Bebernes, University of Colorado, Boulder
Congming Li, University of Colorado, Boulder
Yi Li*, University of Rochester
(9103593)

4:30 p.m.
Symmetry of solutions of nonlinear PDE.
Sagun Chanillo*, Rutgers University, New Brunswick
(9103529)

Saturday April 13, 1996, 2:30 p.m.4:00 p.m.
Special Session on Global Riemannian Geometry, II
Room 102, Warren Weaver Hall
Organizers:
Tobias H. Colding, Courant Institute of Mathematical Sciences, New York University
Claude R. LeBrun, State University of New York, Stony Brook
Santiago R. Simanca, Polytechnic University

2:30 p.m.
On fundamental groups of manifolds of positive sectional curvature.
Xiaochun Rong*, University of Chicago
(9105314)

3:00 p.m.
Manifolds of positive scalar curvature and the BaumConnes conjecture.
Stephan A. Stolz*, University of Notre Dame
(91053122)

3:30 p.m.
Positively curved metrics of cohomogeneity one.
Wolfgang Ziller*, University of Pennsylvania
K. Grove, University of Maryland, College Park
(91053137)

4:00 p.m.
Spectral asymptotics and the geometry of degenerating hyperbolic three manifolds.
J. Dodziuk*, Queens College, City University of New York
Jay A. Jorgenson, Yale University
(9105838)

Saturday April 13, 1996, 2:30 p.m.5:00 p.m.
Special Session on Number Theory, II
Room 613, Warren Weaver Hall
Organizers:
William D. Duke, Rutgers University, New Brunswick
Ze'ev Rudnick, Tel Aviv University, Israel

2:30 p.m.
Groups of functional equations for Dirichlet series in two variables.
Daniel Willis Bump, Stanford University
Solomon Friedberg, University of California at San Diego, La Jolla
Jeffrey Hoffstein*, Brown University
(9101153)

3:10 p.m.
On the distribution of roots of quadratic congruences.
Arpad Toth*, Rutgers University, New Brunswick
(9101174)

3:50 p.m.
Expansion of modular forms about special points.
Fernando Rodriguez Villegas*, Princeton University
(9101160)

4:30 p.m.
Special values of twisted symmetric square $L$functions.
Jeffrey Stopple*, University of California, Santa Barbara
(9101125)

Saturday April 13, 1996, 2:30 p.m.4:50 p.m.
Special Session on Hyperbolic Geometry and Discrete Groups, II
Room 632, Shimkin Hall
Organizers:
Jane P. Gilman, Rutgers University, Newark

2:30 p.m.
Hyperbolic $3$manifolds with nonintersecting closed geodesics.
Ara S. Basmajian*, University of Oklahoma
Scott A. Wolpert, University of Maryland, College Park
(9103094)

3:00 p.m.
$3$parabolic Fuchsian groups.
Todd A. Drumm*, University of Pennsylvania
(91051119)

3:30 p.m.
Extended bisectors in complex hyperbolic and projective space.
William Mark Goldman*, University of Maryland, College Park
(9105366)

4:00 p.m.
Geometrical finiteness for hyperbolic orbifolds.
Emily Hamilton*, Rice University
(9105769)

4:30 p.m.
Shuffling homotopy equivalences and limits of Kleinian groups.
James W. Anderson, University of Southampton, United Kingdom
Richard D. Canary*, University of Michigan, Ann Arbor
Darryl McCullough, University of Oklahoma
(91057133)

Saturday April 13, 1996, 2:30 p.m.4:50 p.m.
Special Session on Gauge Field Theory, II
Room 626, Shimkin Hall
Organizers:
Janet C. Talvacchia, Swarthmore College
Yisong Yang, Polytechnic University

2:30 p.m.
Torus splittings and spectral flow of the twisted signature operator.
Christopher M. Herald*, McMaster University
(9105363)

3:00 p.m.
Euler characteristics of moduli spaces of instantons over four sphere.
Youliang Tian*, Courant Institute of Mathematical Sciences, New York University
(9105362)

3:30 p.m.
Multiple condensate solutions for the ChernSimonHiggs theory.
Gabriella Tarantello*, Universit'a di Roma Tor Vergata, Roma, Italy
(9103547)

4:00 p.m.
Instantons and the information metric.
David Groisser*, University of Florida
Michael K. Murray, University of Adelaide, Australia
(9105395)

4:30 p.m.
Existence of multivortices solutions for a selfdual MaxwellChernSimonsHiggs system.
Dongho Chae*, Seoul National University, Seoul, Korea
Namkwon Kim, Postech, Korea
(91053138)

Saturday April 13, 1996, 2:30 p.m.5:00 p.m.
Special Session on Topological Methods, II
Room 813, Warren Weaver Hall
Organizers:
Charles R. Traina, Saint John's University
Lawrence Narici, Saint John's University
Edward Beckenstein, Saint John's University

2:30 p.m.
How many $\Omega$bounded subgroups?
W. Wistar Comfort*, Wesleyan University
Jan van Mill, Vrije University,
(9102267)

3:00 p.m.
Informal discussion

3:50 p.m.
Transfinite induction with control.
Alan Dow*, York University
(91054112)

4:30 p.m.
Intersections of Fr\'echetSchwartz spaces and their duals.
Jose Bonet*, Universidad Polytechnica de Valencia, Spain
(91099141)

Saturday April 13, 1996, 2:30 p.m.4:20 p.m.
Special Session on Stochastic Models in Mathematical Finance, II
Room 109, Warren Weaver Hall
Organizers:
Thaleia Zariphopoulou, University of Wisconsin, Madison

2:30 p.m.
Backward stochastic differential equations, finance and optimization.
Nicole El Karoui*, University of Paris VI, France
Shinge Peng, Shandong University, People's Republic of China
Marie Claire Quenez, University de Marne la Vallee, France
(9106089)

3:00 p.m.
A compactness principle for bounded sequences of martingales with applications to mathematical finance.
F. Delbaen, Vrije University of Brussels, Belgium
W. Schachermayer*, Vienna University, Austria
(9103507)

3:30 p.m.
Modeling and computation of international general financial equilibrium in the presence of transaction costs and price policy interventions: A variational inequality approach.
Anna B. Nagurney*, University of Massachusetts, Amherst
Stavros Siokos, University of Massachusetts, Amherst
(9109044)

4:00 p.m.
A new approach to analytic valuation in the Black Scholes Model.
Peter P. Carr*, Cornell University
(9106042)

Saturday April 13, 1996, 2:30 p.m.4:40 p.m.
Special Session on Differential Algebra, II
Room 634, Shimkin Hall
Organizers:
Phyllis J. Cassidy, Smith College
William F. Keigher, Rutgers University, Newark
Michael F. Singer, North Carolina State University

2:30 p.m.
Differential resultants revisited.
Emma Previato*, Boston University
(91014102)

2:50 p.m.
The model theory of differential fields of finite characteristic.
Carol S. Wood*, Wesleyan University
(91014135)

3:10 p.m.
Model theory and differential algebra.
Anand Pillay*, University of Notre Dame
(9101499)

3:30 p.m.
Invariant derivations with no new constants.
Andy R. Magid*, University of Oklahoma
Lourdes Juan, University of Oklahoma
(9101277)

Saturday April 13, 1996, 2:30 p.m.5:10 p.m.
Contributed Paper Session, I
Room 1013, Warren Weaver Hall

2:30 p.m.
Giordano cubes.
Joseph Arkin*, United States Military Academy
David C. Arney, United States Military Academy
Rickey A. Kolb, United States Military Academy
(9101110)

2:45 p.m.
A necessary and sufficient condition for lifting the hyperelliptic involution.
Peter Turbek*, Purdue University, Calmuet
(9103027)

3:00 p.m.
Relationships between various outer measures associated with lattice measures.
Peter D. Stratigos*, Long Island University, Brooklyn Center
(9102833)

3:15 p.m.
Outer measures and measurable sets.
Carmen Doina Vlad*, Pace University, New York
(9102834)

3:30 p.m.
G.C.D. and L.C.M. of two entire functions.
ChungChun Yang*, Hong Kong University of Science & Technology, Hong Kong
(9103005)

3:45 p.m.
An integral operator for analytic solutions of the wave equation.
Allan Fryant*, Greensboro College
Murali Krishna Vemuri, University of Chicago
(9103519)

4:00 p.m.
$L^p$gradient estimates for viscosity solutions of fully nonlinear, uniformly elliptic equations.
Andrzej Janusz Swiech*, Georgia Institute of Technology
(9103526)

4:15 p.m.
The binomial coefficients and beyond.
Larry Ericksen*, Millville, New Jersey
(9104018)

4:30 p.m.
Powers of absolutely convergent Fourier series.
Bogdan Baishanski*, Ohio State University, Columbus
Michael Snell, Ohio State University, Columbus
(91041132)

4:45 p.m.
Disintegration of measures and a variational problem governed by a differential inclusion.
Toru Maruyama*, University of California, Berkeley and Keio University, Japan
(9104956)

5:00 p.m.
Nonorthogonal wavelet approximation with rates of deterministic signals.
George A. Anastassiou*, The University of Memphis
Stamatis Cambanis, The University of North Carolina, Chapel Hill
(91099144)

Saturday April 13, 1996, 2:30 p.m.4:30 p.m.
International Forum
Perspectives on Doing Mathematics in the Electronic Age.
Room 1302, Warren Weaver Hall
Panelists:
John H. Ewing, American Mathematical Society
Martin Groetschel, KonradZuseZentrum fuer Informationstechnik
Joachim Heinze, SpringerVerlag
Andrew M. Odlyzko, AT&T Research

Saturday April 13, 1996, 7:00 p.m.11:00 p.m.
Council
Majestic Music Box, New York Marriott Marquis
Sunday April 14, 1996

Sunday April 14, 1996, 8:00 a.m.12:00 p.m.
Book Sale and Electronic Products

Sunday April 14, 1996, 8:30 a.m.10:50 a.m.
Special Session on Hyperbolic Geometry and Discrete Groups, III
Room 101, Warren Weaver Hall
Organizers:
Jane P. Gilman, Rutgers University, Newark

8:30 a.m.
Hyperbolicity in the complex of curves.
Yair N. Minsky*, State University of New York, Stony Brook
Howard A. Masur, University of Illinois, Chicago
(91057120)

9:00 a.m.
Parametrization of Teichm\"uller space by geodesic length functions.
Feng Luo*, Rutgers University, New Brunswick
(9103084)

9:30 a.m.
An algorithm to decide the discreteness of an explicit finitely generated elementary subgroup of $SL_2(\overline {\Bbb Q}_{\rm{alg}})\subset SL_2(\Bbb C)$.
Robert F. Riley*, State University of New York, Binghamton
(91030104)

10:00 a.m.
Pleating varieties in quasiFuchsian space.
Linda Keen*, Herbert H. Lehman College, City University of New York
Caroline Series, University of Warwick, United Kingdom
(9103096)

10:30 a.m.
Iteration on the Bers slice.
Jeffrey F. Brock*, University of California, Berkeley
(91099143)

Sunday April 14, 1996, 8:30 a.m.10:20 a.m.
Special Session on Gauge Field Theory, III
Room 626, Shimkin Hall
Organizers:
Janet C. Talvacchia, Swarthmore College
Yisong Yang, Polytechnic University

8:30 a.m.
Mass degeneracies in selfdual ChernSimons theories.
Gerald Dunne*, University of Connecticut, Storrs
(9108170)

9:00 a.m.
Hawking radiation and EinsteinYang/Mills equations.
Joel A. Smoller*, University of Michigan, Ann Arbor
Arthur G. Wasserman, University of Michigan, Ann Arbor
(9108359)

9:30 a.m.
Gauge theories of twodimensional gravity.
Roman Jackiw*, Massachusetts Institute of Technology
(9108157)

10:00 a.m.
YangMills hierarchies in even dimensions and their descendants.
D. H. Tchrakian*, Saint Patrick's College, Ireland
(91081113)

Sunday April 14, 1996, 8:30 a.m.10:20 a.m.
Special Session on Stochastic Models in Mathematical Finance, III
Room 109, Warren Weaver Hall
Organizers:
Thaleia Zariphopoulou, University of Wisconsin, Madison

8:30 a.m.
Managing market risk and volatility risk: A new approach using dynamic programming and portfolio optimization.
Marco M. Avellaneda*, Courant Institute of Mathematical Sciences, New York University
(9103511)

9:00 a.m.
General properties of option prices.
Bruce Grundy*, University of Pennsylvania
(9109045)

9:30 a.m.
Optimization models with stochastic volatility.
Mohsen Mazaheri*, University of Wisconsin, Madison
Thaleia Zariphopoulou, University of Wisconsin, Madison
(9106040)

10:00 a.m.
Using nonstandard analysis methods to analyze nonstandard asset price models.
Walter Willinger*, Bellcore, Morristown, New Jersey
(9106013)

Sunday April 14, 1996, 8:40 a.m.10:50 a.m.
Special Session on Differential Algebra, III
Room 634, Shimkin Hall
Organizers:
Phyllis J. Cassidy, Smith College
William F. Keigher, Rutgers University, Newark
Michael F. Singer, North Carolina State University

8:40 a.m.
Differential modules defined by systems of equations.
Alan C. Adolphson*, Oklahoma State University, Stillwater
Steven Sperber, University of Minnesota, Minneapolis
(91014129)

9:15 a.m.
Galois groups of order four linear differential equations.
Sabrina A. Hessinger*, North Carolina State University
(91012110)

9:50 a.m.
Computing the genus of a curve.
Barry Trager*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(91014134)

10:25 a.m.
Hurwitz series as formal functions.
William F. Keigher*, Rutgers University, Newark
Frank Leon Pritchard, Rutgers University, Newark
(91013100)

Sunday April 14, 1996, 9:00 a.m.10:50 a.m.
Special Session on Partial Differential Equations, III
Room 1302, Warren Weaver Hall
Organizers:
Patricia E. Bauman, Purdue University, West Lafayette
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
Peter J. Sternberg, Indiana University, Bloomington

9:00 a.m.
Monotonicity formulas for solutions of equations in adjacent domains.
Luis A. Caffarelli*, Courant Institute of Mathematical Sciences, New York University
(91035106)

9:40 a.m.
Gauged harmonic maps from $R^2$ to $S^2$.
Yisong Yang*, Polytechnic University
(9103587)

10:20 a.m.
On the existence and uniqueness of constant mean curvature hypersurfaces in hyperbolic space.
Barbara Nelli, University of Paris VII, France
Joel Spruck*, Johns Hopkins University
(91035131)

Sunday April 14, 1996, 9:00 a.m.10:50 a.m.
Special Session on Global Riemannian Geometry, III
Room 102, Warren Weaver Hall
Organizers:
Tobias H. Colding, Courant Institute of Mathematical Sciences, New York University
Claude R. LeBrun, State University of New York, Stony Brook
Santiago R. Simanca, Polytechnic University

9:00 a.m.
The geometry of the first Stekloff eigenvalue.
Jose F. Escobar*, Cornell University
(9105376)

9:30 a.m.
Gluing constructions for noncompact geometric problems.
Daniel Pollack*, University of Chicago
(9105898)

10:00 a.m.
Glueing constructions of minimal surfaces.
Nicolaos Kapouleas*, Brown University
(91053127)

10:30 a.m.
Real Kaehler submanifolds in low codimension.
Marcos Dajczer, Institute for PureApplied Mathematics, Brazil
Detlef Gromoll*, State University of New York, Stony Brook
(91053109)

Sunday April 14, 1996, 9:00 a.m.10:50 a.m.
Special Session on Number Theory, III
Room 613, Warren Weaver Hall
Organizers:
William D. Duke, Rutgers University, New Brunswick
Ze'ev Rudnick, Tel Aviv University, Israel

9:00 a.m.
Remarks about continued fractions and real quadratic fields.
Brian Conrey*, Oklahoma State University, Stillwater
(91011107)

9:40 a.m.
The zeta function and the lap counting function of linear mod one transformations.
Leopold Flatto, AT&T Research, Murray Hill, New Jersey
Jeffrey C. Lagarias*, AT&T Research, Murray Hill, New Jersey
(9105885)

10:20 a.m.
The Cesaro mean of the $\{n\alpha\}$ sequence and real quadratic fields.
Jozsef Beck*, Rutgers University, New Brunswick
(9101137)

Sunday April 14, 1996, 9:30 a.m.10:40 a.m.
Special Session on Topological Methods, III
Room 813, Warren Weaver Hall
Organizers:
Charles R. Traina, Saint John's University
Lawrence Narici, Saint John's University
Edward Beckenstein, Saint John's University

9:30 a.m.
Discrete C*embedded subsets of a locally compact Abelian group with its Bohr topology.
Jorge Galindo, Universitat Jaume I, Spain
Salvador Hernandez*, Universitat Jaume I, Spain
(91099142)

10:10 a.m.
On the Borel theorem.
J. Schmets*, University of Liege, Belgium
Manuel Valdivia, University of Valencia, Spain
(9104668)

Sunday April 14, 1996, 11:00 a.m.11:50 a.m.
Invited Address
The Riemann zeta function and random matrix theory.
Room 109, Warren Weaver Hall
Ze\'ev Rudnick*, Tel Aviv University, Israel
(9101102)

Sunday April 14, 1996, 1:30 p.m.2:20 p.m.
Invited Address
The inverse problem in differential Galois theory.
Room 109, Warren Weaver Hall
Michael F. Singer*, North Carolina State University
(9101204)

Sunday April 14, 1996, 2:30 p.m.5:00 p.m.
Special Session on Partial Differential Equations, IV
Room 1302, Warren Weaver Hall
Organizers:
Patricia E. Bauman, Purdue University, West Lafayette
Fanghua Lin, Courant Institute of Mathematical Sciences, New York University
Peter J. Sternberg, Indiana University, Bloomington

2:30 p.m.
Incompatibility, hysteresis, and the two well problem.
Robert V. Kohn*, Courant Institute of Mathematical Sciences, New York University
Veronique Lods, University of Paris, France
(9107348)

3:10 p.m.
Higher gradient integrability of equilibria for functionals with rankone convex local energies.
Michael M. Dougherty*, Pennsylvania State University, Reading
(91035105)

3:50 p.m.
Regularity results in models for image segmentation, fracture and damage.
Irene Fonseca*, Carnegie Mellon University
(9104958)

4:30 p.m.
Revisiting the paradigm of the calculus of variations: An extended variational principle.
David Kinderlehrer*, Carnegie Mellon University
(9103588)

Sunday April 14, 1996, 2:30 p.m.4:50 p.m.
Special Session on Global Riemannian Geometry, IV
Room 102, Warren Weaver Hall
Organizers:
Tobias H. Colding, Courant Institute of Mathematical Sciences, New York University
Claude R. LeBrun, State University of New York, Stony Brook
Santiago R. Simanca, Polytechnic University

2:30 p.m.
Disconnectedness of sublevel sets of some Riemannian functionals.
Alexander Nabutovsky*, University of Toronto
(9105365)

3:00 p.m.
Hypercomplex geometry and $3$Sasakian manifolds.
Krzysztof Galicki*, University of New Mexico
(9105354)

3:30 p.m.
Towards a classification of $3$Sasakian manifolds.
Charles P. Boyer*, University of New Mexico
(9105391)

4:00 p.m.
Compact EinsteinWeyl manifolds with large symmetry group.
Yat Sun Poon*, University of California, Riverside
A. B. Madsen, Odense University, Denmark
Henrik Pedersen, Odense University, Denmark
A. Swann, University of Bath, United Kingdom
(9105235)

4:30 p.m.
Extremal K\"ahler metrics.
Andrew D. Hwang*, University of Toronto
(9105821)

Sunday April 14, 1996, 2:30 p.m.5:00 p.m.
Special Session on Number Theory, IV
Room 613, Warren Weaver Hall
Organizers:
William D. Duke, Rutgers University, New Brunswick
Ze'ev Rudnick, Tel Aviv University, Israel

2:30 p.m.
Unusual behavior of coefficients of certain power series.
Andrew M. Odlyzko*, AT&T Research, Murray Hill, New Jersey
(9101180)

3:10 p.m.
Some cusp forms which don't exist.
Stephen David Miller*, Princeton University
(9101151)

3:50 p.m.
Partitions, representation theory and class numbers.
Ken Ono*, Institute for Advanced Study
(9101149)

4:30 p.m.
Remarks on the LangTrotter conjecture.
K. Murty*, Institute for Advanced Study and University of Toronto
(9101182)

Sunday April 14, 1996, 2:30 p.m.4:50 p.m.
Special Session on Hyperbolic Geometry and Discrete Groups, IV
Room 101, Warren Weaver Hall
Organizers:
Jane P. Gilman, Rutgers University, Newark

2:30 p.m.
Riemann surfaces with maximal reflections.
Bernard Maskit*, State University of New York, Stony Brook
(9103083)

3:00 p.m.
Isomorphisms between Teichm\"uller spaces.
Nikola B. Lakic*, Cornell University, Ithaca
(91030130)

3:30 p.m.
Subgroups of generalized Hecke groups.
Shuechin Huang*, Queens College, City University of New York
(91030139)

4:00 p.m.
Projective embeddings of surfaces represented by subgroups of the modular group.
Hershel M. Farkas, Hebrew University of Jerusalem, Israel
Irwin Kra*, State University of New York, Stony Brook
(9103061)

4:30 p.m.
Informal discussion

Sunday April 14, 1996, 2:30 p.m.4:20 p.m.
Special Session on Gauge Field Theory, IV
Room 626, Shimkin Hall
Organizers:
Janet C. Talvacchia, Swarthmore College
Yisong Yang, Polytechnic University

2:30 p.m.
Nonabelian monopoles and invariants of smooth fourmanifolds.
Paul M.N Feehan*, Harvard University
Thomas G. Leness, Michigan State University
(9105830)

3:00 p.m.
Negative tori and the SeibergWitten invariants.
Daniel Ruberman*, Brandeis University
(91057117)

3:30 p.m.
NonAbelian equivariant holomorphic Morse inequalities.
Siye Wu*, International Center for Theoretical Physics, Italy
(91058114)

4:00 p.m.
A gauge theoretic solution to the index number problem in mathematical economics.
Pia N. Malaney, Harvard University
Eric Weinstein*, Massachusetts Institute of Technology
(91053126)

Sunday April 14, 1996, 2:30 p.m.4:30 p.m.
Special Session on Topological Methods, IV
Room 813, Warren Weaver Hall
Organizers:
Charles R. Traina, Saint John's University
Lawrence Narici, Saint John's University
Edward Beckenstein, Saint John's University

2:30 p.m.
Similarities between bicompletion and Smyth completion.
Robert Flagg, University of Southern Maine
Ralph D. Kopperman*, City College, City University of New York
Philipp Sunderhauf, University of Southern Maine
(91054116)

3:00 p.m.
Informal discussion

Sunday April 14, 1996, 2:30 p.m.3:50 p.m.
Special Session on Stochastic Models in Mathematical Finance, IV
Room 109, Warren Weaver Hall
Organizers:
Thaleia Zariphopoulou, University of Wisconsin, Madison

2:30 p.m.
Option pricing in the presence of transaction costs.
H. Mete Soner*, Carnegie Mellon University
(9106012)

3:00 p.m.
Monotone numerical schemes for nonlinear partial differential equations arising in mathematical finance.
Agnes Tourin*, University of ParisDauphine, France
(9103506)

3:30 p.m.
Imperfect competition among informed traders.
Kerry Back*, Washington University
H. Henry Cao, University of California, Berkeley
Gregory A. Willard, Washington University
(9109041)

Sunday April 14, 1996, 2:30 p.m.4:40 p.m.
Special Session on Differential Algebra, IV
Room 634, Shimkin Hall
Organizers:
Phyllis J. Cassidy, Smith College
William F. Keigher, Rutgers University, Newark
Michael F. Singer, North Carolina State University

2:30 p.m.
Addition schemes for first integrals.
William Y. Sit*, City College, City University of New York
(91012103)

3:05 p.m.
Prolongation theory from an algebraic viewpoint.
Raymond T. Hoobler*, City College, City University of New York
(91017124)

3:40 p.m.
Differential specializations and observability in control theory.
Sally D. Morrison*, Bucknell University
(91012125)

4:15 p.m.
Finitely obtainable classes of ideals.
Richard M. Cohn*, Rutgers University, New Brunswick
(91012101)

Sunday April 14, 1996, 2:30 p.m.4:55 p.m.
Contributed Paper Session, II
Room 1013, Warren Weaver Hall

2:30 p.m.
The hexagonal honeycomb: An existence theorem.
Frank Morgan*, Williams College
(9104990)

2:45 p.m.
Solving nonlinear systems of equations using leastsquare Newton iterations.
Yixun Shi*, Bloomsburg University of Pennsylvania
(91065115)

3:00 p.m.
Contact topology and the fournormals theorem.
Juan Carlos Alvarez Paiva*, University of Simon Bolivar, Venezuela
(9105320)

3:15 p.m.
Singular Riemannian manifolds.
Zhongdong Liu*, University of South Carolina, Columbia
Zhongmin Shen, Indiana UniversityPurdue University, Indianapolis
(9105322)

3:30 p.m.
Variational techniques on the associated metrics of complex contact manifolds.
Brendan J. Foreman*, Michigan State University
(9105823)

3:45 p.m.
Discrete surface groups actions with accidental parabolics on complex hyperbolic plane.
Igor Belegradek*, University of Maryland, College Park
(9105764)

4:00 p.m.
On the mean curvature function of isometric immersions.
Georgi I. Kamberov*, University of Massachusetts, Amherst
(9105317)

4:15 p.m.
Asymptotic behavior of solutions and subsolutions of the stationary Schr\"odinger equation.
Alexander I. Kheyfits*, Courant Institute of Mathematical Sciences, New York University
(9103572)

4:30 p.m.
Ergodic theorems for Markov chains.
Onesimo HernandezLerma*, CINVESTAV del IPN, Mexico
Jean B. Lasserre, CINVESTAV del IPN, Mexico
(9106009)

4:45 p.m.
Faruk F. AbiKhuzam

4:45 p.m.
Zerofree regions for sections of power series.
Faruk F. AbiKhuzam*, American University of Beirut
(91030145)
Inquiries: meet@ams.org