AMS Sectional Meeting Full Program
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1996 Spring Central Sectional Meeting
Iowa City, IA, March 2223, 1996
Meeting #909
Associate secretaries:
Andy R Magid, AMS
amagid@ou.edu
Friday March 22, 1996

Friday March 22, 1996, 8:00 a.m.10:50 a.m.
Special Session on Mostly Finite Geometries, I
Room 335, Iowa Memorial Union/Iowa House
Organizers:
Norman L. Johnson, University of Iowa

8:00 a.m.
Remarks on linear systems with parallelism.
T. G. Ostrom*, Washington State University
(9095127)

8:30 a.m.
Regulusfree spreads of $PG(3,q)$.
Gary L. Ebert*, University of Delaware
Ronald D. Baker, West Virginia State College
(90951219)

9:00 a.m.
Ovals and hyperovals in Hall planes.
William E. Cherowitzo*, University of Colorado, Denver
(9095196)

9:30 a.m.
A family of nonBuekenhout unitals in the Hall plane.
Jeremy M. Dover*, University of Delaware
(9092292)

10:00 a.m.
Semifield planes with a transitive autotopism group.
Minerva CorderoVourtsanis*, Texas Tech University
Raul Francisco Figueroa, University of Puerto Rico, Rio Piedras
(90951153)

10:30 a.m.
On projective planes of order $16$.
M. J. De Resmini*, University of Rome, Italy
(90951155)

Friday March 22, 1996, 8:00 a.m.10:50 a.m.
Special Session on Commutative Ring Theory, I
Room 256, Iowa Memorial Union/Iowa House
Organizers:
Daniel D. Anderson, University of Iowa

8:00 a.m.
Factorization in subrings of power series rings.
David F. Anderson*, University of Tennessee, Knoxville
(90913115)

8:30 a.m.
Halffactorial domains in quadratic fields.
James Barker Coykendall, IV*, Lehigh University
(9091347)

9:00 a.m.
Generalized integral closures.
Franz HalterKoch*, Karl Franzens Universit\"at, Austria
(9091316)

9:30 a.m.
On generalizations of Krull domains.
Alfred Geroldinger*, Karl Franzens Universit\"at, Austria
(9091305)

10:00 a.m.
Absolutely injective integral domains.
David E. Dobbs*, University of Tennessee, Knoxville
(90913100)

10:30 a.m.
Extensions of commutative rings with linearly ordered intermediate rings.
Michael S. Gilbert*, University of Tennessee, Knoxville
(90913190)

Friday March 22, 1996, 8:30 a.m.10:50 a.m.
Special Session on Moments and Operators, I
Room 348, Iowa Memorial Union/Iowa House
Organizers:
Raul E. Curto, University of Iowa
Palle E. T. Jorgensen, University of Iowa
Paul S. Muhly, University of Iowa

8:30 a.m.
Informal discussion

9:00 a.m.
Groupoids and operators.
Arlan B. Ramsay*, University of Colorado, Boulder
(90947133)

9:30 a.m.
Hyponormal operators with finite rank selfcommutator and quadrature domains.
Daoxing Xia*, Vanderbilt University
(9094713)

10:00 a.m.
Spectral theory for semibounded Jacobi matrices.
Steen Pedersen*, Wright State University, Dayton
(9094643)

10:30 a.m.
Moment problems and positivity conditions for commuting multioperators.
FlorianHoria Vasilescu*, University of Lille I, France
(90947107)

Friday March 22, 1996, 8:30 a.m.10:50 a.m.
Special Session on Physical Knot Theory, I
Room 346, Iowa Memorial Union/Iowa House
Organizers:
Jonathan K. Simon, University of Iowa
Gregory Buck, Saint Anselm's College

8:30 a.m.
Informal discussion

9:00 a.m.
DNA base sequence and longrange threedimensional structure.
Wilma Olson*, Rutgers University, New Brunswick
(90957256)

9:30 a.m.
Buckling transitions in superhelical DNA: Dependence on the elastic constants and DNA size.
Gomathi Ramachandran, Courant Institute of Mathematical Sciences, New York University
Tamar Schlick*, Courant Institute of Mathematical Sciences, New York University
(90935189)

10:00 a.m.
Conformational variability of kilobasesized DNA molecules.
Nancy C. Stellwagen*, University of Iowa
Kurt Strutz, University of Iowa
(90992257)

10:30 a.m.
Control of DNA structure and topology.
Nadrian C. Seeman*, Courant Institute of Mathematical Sciences, New York University
(9095764)

Friday March 22, 1996, 8:30 a.m.10:20 a.m.
Special Session on Geometry and Cohomology, I
Room 343, Iowa Memorial Union/Iowa House
Organizers:
Walter I. Seaman, University of Iowa

8:30 a.m.
A characterization of complex projective space.
Stephen P. Bean*, University of Iowa
(9095311)

9:00 a.m.
Lengths of closed geodesics in certain $2$step nilmanifolds.
Maura B. Mast*, University of Northern Iowa
Ruth Gornet, Texas Tech University
(90953217)

9:30 a.m.
Quasiregular representations and the geometry of nilmanifolds.
Ruth Gornet*, Texas Tech University
(90953191)

10:00 a.m.
Asymptotics of heat kernels on Riemannian foliations.
Kenneth S. Richardson*, Texas Christian University
(9095866)

Friday March 22, 1996, 8:30 a.m.10:50 a.m.
Special Session on Topology of 3manifolds, I
Room 345, Iowa Memorial Union/Iowa House
Organizers:
Charles Frohman, University of Iowa
YingQing Wu, University of Iowa

8:30 a.m.
$SU(3)$ representations of some easy knot groups.
Hans Ulysses Boden*, McMaster University
(9095719)

9:00 a.m.
Perturbed flat moduli spaces for composite knots.
Christopher M. Herald*, McMaster University
(9095861)

9:30 a.m.
A splitting formula for spectral flow.
Mark Daniel*, Indiana University, Bloomington
(9095751)

10:00 a.m.
Analytic deformations of the spectrum of Dirac operators on a $3$manifold with boundary.
Paul A. Kirk*, Indiana University, Bloomington
Eric P. Klassen, Florida State University
(9095762)

10:30 a.m.
The spectral flow of the odd signature operator and higher Massey products.
Paul A. Kirk, Indiana University, Bloomington
Eric P. Klassen*, Florida State University
(9095859)

Friday March 22, 1996, 9:00 a.m.10:50 a.m.
Special Session on Arrangements of Hyperplanes, I
Room 351, Iowa Memorial Union/Iowa House
Organizers:
Michael J. Falk, Northern Arizona University
Richard C. Randell, University of Iowa

9:00 a.m.
Quadratic algebras of hyperplane arrangements.
Sergey Yuzvinsky*, University of Oregon
(90952149)

9:30 a.m.
Braid monodromy and fundamental groups of arrangements.
Daniel C. Cohen*, Louisiana State University, Baton Rouge
Alexandru I. Suciu, Northeastern University
(90914209)

10:00 a.m.
Some fourdimensional convex polyhedra.
Vincent J. Matsko*, Quincy University
(9095242)

10:30 a.m.
Intersection theory in $\Omega$*(log$D$).
Roberto Silvotti*, State University of New York, Stony Brook
(90952241)

Friday March 22, 1996, 9:00 a.m.10:50 a.m.
Special Session on Group Representations and Mathematical Physics, I
Room 301, Van Allen Hall
Organizers:
Tuong TonThat, University of Iowa

9:00 a.m.
A gravitational theory arising from $2D$ string symmetries.
V. G. J. Rodgers*, University of Iowa
R. P. Lano, University of Iowa
(90922235)

9:30 a.m.
Orthosymplectic Lie superalgebras and Brauer algebras.
Georgia M. Benkart*, University of Wisconsin, Madison
(90917202)

10:00 a.m.
Invariant theory and ClebschGordanRacah coefficients of compact group.
W. H. Klink*, University of Iowa
(90922180)

10:30 a.m.
On harmonic analysis in spaces of rectangular matrices.
Ray A. Kunze*, University of Georgia
(90942204)

Friday March 22, 1996, 9:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations, I
Room 337, Iowa Memorial Union/Iowa House
Organizers:
Lihe Wang, University of Iowa
Gerhard O. Strohmer, University of Iowa

9:00 a.m.
CampanatoJohnNirenbergMorrey estimates for solutions of parabolic equations and applications.
HongMing Yin*, University of Notre Dame
(9093514)

9:30 a.m.
Global entropy weak solutions of the initialboundaryvalue problem for the nonlinear EulerPoisson equations.
GuiQiang Chen*, Northwestern University
Dehua Wang, University of Chicago
(90935136)

10:00 a.m.
Stable solutions of the GinzburgLandau system with an applied magnetic field.
Patricia E. Bauman*, Purdue University, West Lafayette
Daniel Phillips, Purdue University, West Lafayette
Qi Tang, University of Sussex, United Kingdom
(90935160)

10:30 a.m.
Isoperimetric and Sobolev inequalities on CarnotCaratheodory spaces and applications.
Nicola Garofalo*, Purdue University, West Lafayette
DuyMinh Nhieu, Purdue University, West Lafayette
(90935262)

Friday March 22, 1996, 9:30 a.m.10:50 a.m.
Special Session on Current Issues in Nonlinear Conservation Laws, I
Room 253, Iowa Memorial Union/Iowa House
Organizers:
Suncica Canic, Iowa State University

9:30 a.m.
Riemann solutions for conservation laws.
James G. Glimm*, State University of New York, Stony Brook
(9097698)

10:00 a.m.
Riemann problem solutions of codimensions $0$ and $1$.
Stephen Schecter*, North Carolina State University
(90935108)

10:30 a.m.
Structural stability of Riemann solutions with respect to the change in viscosity.
Suncica Canic*, Iowa State University
(90976196)

Friday March 22, 1996, 11:00 a.m.11:50 a.m.
Invited Address
Holomorphic automorphisms of $\Bbb C^n$.
Auditorium, Pappajohn Business Administration Building
Franc Forstneric*, University of Wisconsin, Madison
(9093201)

Friday March 22, 1996, 1:30 p.m.2:20 p.m.
Invited Address
Geometry and algebra: A unified voice.
Auditorium, Pappajohn Business Administration Building
Ruth J. Lawrence*, University of Michigan, Ann Arbor
(9095704)

Friday March 22, 1996, 2:30 p.m.6:20 p.m.
Special Session on Mostly Finite Geometries, II
Room 335, Iowa Memorial Union/Iowa House
Organizers:
Norman L. Johnson, University of Iowa

2:30 p.m.
Informal discussion

3:00 p.m.
A new family of extended generalized quadrangles.
Anna Kasikova, Kansas State University
Ernest E. Shult*, Kansas State University
(90951113)

3:30 p.m.
On the construction of Coulter and Matthews.
Michael J. Kallaher*, Washington State University
(90951121)

4:00 p.m.
Some generalized quadrangles in characteristic $2$.
Geoffrey Mason*, University of California, Santa Cruz
(90920157)

4:30 p.m.
Recent results concerning Singer groups.
Chat Yin Ho*, University of Florida
(90951243)

5:00 p.m.
Coset representation of homogenous geometrical structures.
Thomas Q. Sibley*, Saint John's University
(9095181)

5:30 p.m.
On the classification of $4$dimensional projective planes.
D. Betten*, University of Kiel, Germany
(90951176)

6:00 p.m.
Four dimensional projective planes with a solvable collineation group.
Hauke Klein*, University of Kiel, Germany
(90951177)

Friday March 22, 1996, 2:30 p.m.6:20 p.m.
Special Session on Group Representations and Mathematical Physics, II
Room 301, Van Allen Hall
Organizers:
Tuong TonThat, University of Iowa

2:30 p.m.
Representations of $p$adic groups and continuum limits in physically motivated eigenvalue problems.
Yannick Meurice*, University of Iowa
(90922150)

3:00 p.m.
Geometric approach to representations of the Virasoro algebra.
Alexandre A. Kirillov*, University of Pennsylvania
(9092217)

3:30 p.m.
Coherent state representations and coherent tensors.
David J. Rowe*, University of Toronto
(90920242)

4:00 p.m.
A $BBG$ type resolution of produced modules.
Floyd L. Williams*, University of Massachusetts, Amherst
(9092224)

4:30 p.m.
Scattering equivalence and representations of the Poincar\'e group.
Wayne N. Polyzou*, University of Iowa
(90981162)

5:00 p.m.
Unitary representations of pseudounitary groups.
Raj Wilson*, University of Texas, San Antonio
(90922234)

5:30 p.m.
Spectrum generating operators.
Thomas Patrick Branson*, University of Iowa
(90922245)

6:00 p.m.
Hypergeometric functions and highest weight representations.
Mark G. Davidson*, Louisiana State University, Baton Rouge
(90922182)

Friday March 22, 1996, 2:30 p.m.6:20 p.m.
Special Session on Commutative Ring Theory, II
Room 256, Iowa Memorial Union/Iowa House
Organizers:
Daniel D. Anderson, University of Iowa

2:30 p.m.
On root closure in noetherian domains.
Moshe Roitman*, University of Haifa, Israel
(90913168)

3:00 p.m.
Radicals and subextensions.
Ahmed Ayache, Poste de l'Ancienne Universite, Republic of Yemen
PaulJean Cahen*, Faculty de Science de St Jerome, France
(90913164)

3:30 p.m.
On cross numbers of minimal zero sequences.
Scott Thomas Chapman*, Trinity University
Alfred Geroldinger, Karl Franzens Universit\"at, Austria
(90913130)

4:00 p.m.
$UMT$domains and domains with Pr\"ufer integral closure.
Marco Fontana, Terza University Degli Study of Rome, Italy
Stefania Gabelli, University of Rome La Sapienza, Italy
Evan G. Houston*, University of North Carolina, Charlotte
(90913156)

4:30 p.m.
A basis for the ring of polynomials integervalued on prime numbers.
William W. Smith*, University of North Carolina, Chapel Hill
JeanLuc Chabert, University de Picardie, France
Scott Thomas Chapman, Trinity University
(9091320)

5:00 p.m.
Onedimensional bounded factorization domains.
Jeanam Park*, University of Tennessee, Knoxville
(90913163)

5:30 p.m.
The $u$, $u^{1}$ Lemma revisited.
Daniel D. Anderson, University of Iowa
Dong Je Kwak*, Kyungpook University, Korea
(9091345)

6:00 p.m.
$t$Invertibility IV.
Daniel D. Anderson, University of Iowa
M. Zafrullah*, MTA Teleport, Silver Spring, Maryland
(90913144)

Friday March 22, 1996, 2:45 p.m.5:50 p.m.
Special Session on Derivatives and Financial Mathematics, I
Room 337, Iowa Memorial Union/Iowa House
Organizers:
John F. Price, Maharishi International University

2:45 p.m.
Option pricing theory: From partial differential equations to fractals.
John F. Price*, Maharishi International University
(9099071)

3:30 p.m.
Insurance derivatives.
Thomas V. O'Brien*, Bowling Green State University
(9099070)

4:00 p.m.
Lattice methods for exotic options.
Robert Benhenni*, First National Bank of Chicago, Chicago, Illinois
Anlong Li, First National Bank of Chicago, Chicago, Illinois
(9099075)

4:30 p.m.
Using stock price as numeraire in latticebased option pricing models.
Anlong Li*, First National Bank of Chicago, Chicago, Illinois
(9099073)

5:00 p.m.
Pricing perpetual American options on two stocks.
Hans U. Gerber, University of Lausanne, Switzerland
Elias S. Shiu*, University of Iowa
(9099072)

5:30 p.m.
Emerging opportunities to combine studies in mathematics and finance.
Anand M. Vijh*, University of Iowa
(9099836)

Friday March 22, 1996, 3:00 p.m.6:20 p.m.
Special Session on Moments and Operators, II
Room 348, Iowa Memorial Union/Iowa House
Organizers:
Raul E. Curto, University of Iowa
Palle E. T. Jorgensen, University of Iowa
Paul S. Muhly, University of Iowa

3:00 p.m.
On the atoms of free convolutions.
Hari Bercovici*, Indiana University, Bloomington
Dan Voiculescu, University of California, Berkeley
(90946265)

3:30 p.m.
Subnormality and composition operators on Hardy spaces.
Carl C. Cowen*, Purdue University, West Lafayette
(9094731)

4:00 p.m.
Moment problems in noncommutative settings.
Mischa Cotlar, Universidad Central de Venezuela, Venezuela
Cora S. Sadosky*, Mathematical Sciences Research Institute, Berkeley
(90947105)

4:30 p.m.
A $C*$algebra generated by a finite set of projections.
N. L. Vasilevski*, CINVESTAV del IPN, Mexico
(90946170)

5:00 p.m.
Boundary interpolation and Hamburger moment problem: The state space method for parametrizing the set of all solutions.
Joseph A. Ball*, Virginia Polytech Institute & State University
(9094795)

5:30 p.m.
Orthogonal polynomials in several variables and operator theory.
Yuan Xu*, University of Oregon
(90947172)

6:00 p.m.
A model for joint seminormality and the CowenDouglas class.
Norberto Salinas*, University of Kansas
(90947264)

Friday March 22, 1996, 3:00 p.m.5:50 p.m.
Special Session on Arrangements of Hyperplanes, II
Room 351, Iowa Memorial Union/Iowa House
Organizers:
Michael J. Falk, Northern Arizona University
Richard C. Randell, University of Iowa

3:00 p.m.
On the topology of strata in the standard discriminant.
Boris Z. Shapiro*, Stockholm University, Sweden
Volkmar Welker, Institute for Experimental Mathematics, University at GHEssen, Germany
(90957268)

3:30 p.m.
On twisted de Rham cohomology.
Alan C. Adolphson*, Oklahoma State University, Stillwater
Steven Sperber, University of Minnesota, Minneapolis
(90914210)

4:00 p.m.
Signedgraphic arrangements of hyperplanes.
Guy David Bailey*, University of Minnesota, Minneapolis
(9095218)

4:30 p.m.
Configuration spaces and subspace arrangements.
Sheila Sundaram*, University of Miami
(90905230)

5:00 p.m.
Cohomology and classification of $OS$ algebras.
Michael J. Falk*, Northern Arizona University
(90952233)

5:30 p.m.
A normal form algorithm for modules over two lines in the plane.
Reinhard Laubenbacher*, New Mexico State University, Las Cruces
Bernd Sturmfels, University of California, Berkeley
(9091346)

Friday March 22, 1996, 3:00 p.m.6:20 p.m.
Special Session on Physical Knot Theory, II
Room 346, Iowa Memorial Union/Iowa House
Organizers:
Jonathan K. Simon, University of Iowa
Gregory Buck, Saint Anselm's College

3:00 p.m.
Informal discussion

3:30 p.m.
DNA knots.
Andrzej Stasiak*, University of Lausanne, Switzerland
Didier Michoud, University of Lausanne, Switzerland
(9095755)

4:00 p.m.
Equilibrium topological links of closed polymer chains.
Alexander Vologodskii*, Courant Institute of Mathematical Sciences, New York University
(9095739)

4:30 p.m.
Entanglement complexity of lattice ribbons.
Stuart G. Whittington*, University of Toronto
(9095712)

5:00 p.m.
Random knotting in uniform embeddings of graphs in $Z^3$.
Christine E. Soteros*, University of Saskatchewan
(9095784)

5:30 p.m.
A strand passage metric for topoisomerase action.
Isabel K. Dazey*, Florida State University
De Witt L. Sumners, Florida State University
(90957206)

6:00 p.m.
Informal discussion

Friday March 22, 1996, 3:00 p.m.5:20 p.m.
Special Session on Geometry and Cohomology, II
Room 343, Iowa Memorial Union/Iowa House
Organizers:
Walter I. Seaman, University of Iowa

3:00 p.m.
The FaryMilnor theorem for Hadamard $3$manifolds.
Stephanie B. Alexander*, University of Illinois, UrbanaChampaign
Richard L. Bishop, University of Illinois, UrbanaChampaign
(90953237)

3:30 p.m.
Can one hear the braid group?
Garth Baker*, University of Tennessee, Knoxville
(9095169)

4:00 p.m.
Racetracks and extremal problems for curves of bounded curvature in metric spaces.
Stephanie B. Alexander, University of Illinois, UrbanaChampaign
Richard L. Bishop*, University of Illinois, UrbanaChampaign
(90951244)

4:30 p.m.
Distributed vortices and the SeibergWitten equations.
Steven B. Bradlow*, University of Illinois, UrbanaChampaign
Oscar GarciaPrada, University Autonoma de Cantoblanco, Spain
(90951179)

5:00 p.m.
Kernels of monodromy representations.
James A. Carlson*, University of Utah
Domingo Toledo, University of Utah
(90914223)

Friday March 22, 1996, 3:00 p.m.5:50 p.m.
Special Session on Topology of 3manifolds, II
Room 345, Iowa Memorial Union/Iowa House
Organizers:
Charles Frohman, University of Iowa
YingQing Wu, University of Iowa

3:00 p.m.
Comparing Heegaard splittingsthe bounded case.
Rubinstein, Melbourne University, Australia
Martin G. Scharlemann*, University of California, Santa Barbara
(9095794)

3:30 p.m.
Quantum obstructions to embedding a manifold in $S^3$.
Charles Frohman, University of Iowa
Joanna M. KaniaBartoszynska*, Boise State University
(9095756)

4:00 p.m.
$SL(2,C)$ topological quantum field theory with corners.
Razvan Gelca*, University of Iowa
(9095730)

4:30 p.m.
Graph manifolds and taut foliations.
Mark W. Brittenham*, New Mexico State University, Las Cruces
Ramin Naimi, University of California, Davis
Rachel Dedwydd Roberts, Washington University
(9095752)

5:00 p.m.
Intersecting surfaces.
Rachel Dedwydd Roberts*, Washington University
(90954111)

5:30 p.m.
Detecting the unknot in polynomial time.
Charles I. Delman*, Eastern Illinois University
Keith D. Wolcott, Eastern Illinois University
(9095799)

Friday March 22, 1996, 3:00 p.m.5:20 p.m.
Special Session on Nonlinear Partial Differential Equations, II
Room 341, Iowa Memorial Union/Iowa House
Organizers:
Lihe Wang, University of Iowa
Gerhard O. Strohmer, University of Iowa

3:00 p.m.
On steady two dimensional flows with concentrated vortices.
Alan R. Elcrat*, Wichita State University
(90935122)

3:30 p.m.
Can damping inhibit blowup?
Howard A. Levine*, Iowa State University
James B. Serrin, University of Minnesota, Minneapolis
(9093535)

4:00 p.m.
A new proof of boundary gradient estimates for quasilinear elliptic equations.
Gary M. Lieberman*, Iowa State University
(90935259)

4:30 p.m.
On a connection between linearized stability and the bifurcation function.
Michael W. Smiley*, Iowa State University
(90935181)

5:00 p.m.
Functionals with free interfaces and their flows.
Qing Han*, University of Notre Dame
(90935159)

Friday March 22, 1996, 3:00 p.m.4:50 p.m.
Special Session on Current Issues in Nonlinear Conservation Laws, II
Room 253, Iowa Memorial Union/Iowa House
Organizers:
Suncica Canic, Iowa State University

3:00 p.m.
Global solutions for the NavierStokes equations of multidimensional, compressible, heatconducting flow with discontinuous initial data.
David C. Hoff*, Indiana University, Bloomington
(9093538)

3:30 p.m.
On a nonlocal dispersive equation modeling suspensions.
Kevin R. Zumbrun*, Indiana University, Bloomington
(90935134)

4:00 p.m.
Asymptotic decay of periodic solutions of nonlinear hyperbolic systems of conservation laws.
GuiQiang Chen*, Northwestern University
Hermano Frid, Northwestern University and Universidade Federal do Rio de Janiero, Brazil
(90935135)

4:30 p.m.
Weak detonation solutions of a combustion model.
Tong Li*, University of Iowa
(90976187)

Friday March 22, 1996, 3:00 p.m.5:50 p.m.
Special Session on Theta Correspondences and Automorphic Forms, I
Room 347, Iowa Memorial Union/Iowa House
Organizers:
David C. Manderscheid, University of Iowa

3:00 p.m.
The theta correspondence for $GSp(2)$ and $GO(4)$.
Brooks Keiluweit Roberts*, University of Toronto
(9091190)

3:30 p.m.
Theta liftings and special values of Hecke $L$functions.
Tonghai Yang*, Institute for Advanced Study
(90911139)

4:00 p.m.
Twisted symmetricsquare $L$functions and the nonexistence of Siegel zeroes on $GL(3)$.
William D. Banks*, McGill University
(90911125)

4:30 p.m.
Shimura integrals for metaplectic covers of $GSp(4)$.
Solomon Friedberg*, University of California, Santa Cruz
(90911175)

5:00 p.m.
Representations of nonlinear groups.
Jeffrey Adams*, University of Maryland, College Park
(90922198)

5:30 p.m.
Theta correspondence for unitary groups over $R$.
Annegret Paul*, University of Maryland, College Park
(9092248)

Friday March 22, 1996, 3:00 p.m.5:50 p.m.
Special Session on Geometric and Analytic Methods in Several Complex Variables, I
Room 257, Iowa Memorial Union/Iowa House
Organizers:
Franc Forstneric, University of Wisconsin, Madison

3:00 p.m.
A Polya theorem in several complex variables.
John P. D'Angelo*, University of Illinois, UrbanaChampaign
(9093208)

3:30 p.m.
Infinitesimal $CR$ automorphisms and uniqueness results.
M. Salah Baouendi, University of California at San Diego, La Jolla
P. Ebenfelt*, University of California at San Diego, La Jolla
Linda Preiss Rothschild, University of California at San Diego, La Jolla
(90932132)

4:00 p.m.
Dynamics of birational maps of $\Bbb P^2$.
Jeffrey Diller*, Cornell University
(9093207)

4:30 p.m.
Solutions of Cauchy Riemann equations on a pseudoconvex domain with non smooth boundary.
Seongan Yie*, Purdue University, West Lafayette
(9093206)

5:00 p.m.
The tangential CauchyRiemann operator on the boundary of convex domains in $\Bbb C^n$.
Khalid FilaliAdib*, San Diego, California
(9093209)

5:30 p.m.
Proper holomorphic mappings between domains in complex nspace.
Xiaojun Huang*, Mathematical Sciences Research Institute, Berkeley
(9093234)
Saturday March 23, 1996

Saturday March 23, 1996, 8:00 a.m.10:50 a.m.
Special Session on Moments and Operators, III
Room 348, Iowa Memorial Union/Iowa House
Organizers:
Raul E. Curto, University of Iowa
Palle E. T. Jorgensen, University of Iowa
Paul S. Muhly, University of Iowa

8:00 a.m.
Moment problems and prediction.
I. C. Gohberg, Tel Aviv University, Israel
Henry J. Landau*, AT&T Research, Murray Hill, New Jersey
(90942131)

8:30 a.m.
Quadrature domains and operator theory.
Liming Yang, University of Hawaii, Honolulu
John E. McCarthy*, Washington University
(90947112)

9:00 a.m.
Positivedefinite functions on free semigroups.
Gelu Fanica Popescu*, University of Texas, San Antonio
(9094782)

9:30 a.m.
The truncated complex moment problem.
Lawrence A. Fialkow*, State University of New York, College at New Paltz
(9094726)

10:00 a.m.
Oneterm solutions of certain moment problems.
Jingbo Xia*, State University of New York, Buffalo
(90947102)

10:30 a.m.
The complex moment problem and subnormality.
F. H. Szafraniec*, Jagiellonian University, Poland
(90947114)

Saturday March 23, 1996, 8:00 a.m.10:50 a.m.
Special Session on Mostly Finite Geometries, III
Room 335, Iowa Memorial Union/Iowa House
Organizers:
Norman L. Johnson, University of Iowa

8:00 a.m.
$p$Ranks of finite geometric structures.
G. Eric Moorhouse*, University of Wyoming
(90951232)

8:30 a.m.
Building a cyclic $q$clan.
Stanley E. Payne*, University of Colorado, Denver
Tim Penttila, University of Western Australia, Australia
Gordon F. Royle, University of Western Australia, Australia
(9095180)

9:00 a.m.
On completing a union of $3$spaces to a plane.
Julia Nowlin Brown*, York University
(90951251)

9:30 a.m.
Virtual derivation.
Robert Allen Liebler*, Colorado State University
(90951238)

10:00 a.m.
Weighted circles in $EG(2,q)$.
F. A. Sherk*, University of Toronto
(90951249)

10:30 a.m.
Parallelisms of $PG(3,3)$.
Alan R. Prince*, HeriotWatt University, United Kingdom
(90951226)

Saturday March 23, 1996, 8:00 a.m.10:50 a.m.
Special Session on Physical Knot Theory, III
Room 346, Iowa Memorial Union/Iowa House
Organizers:
Jonathan K. Simon, University of Iowa
Gregory Buck, Saint Anselm's College

8:00 a.m.
Knot energies by ropes.
Claus Ernst*, Western Kentucky University
Yuanan Diao, Kennesaw State College
Esaias J. Janse van Rensburg, York University
(9095765)

8:30 a.m.
In search of a good polygonal knot energy function.
Yuanan Diao*, Kennesaw State College
Claus Ernst, Western Kentucky University
Esaias J. Janse van Rensburg, York University
(9095787)

9:00 a.m.
Energies for polygonal knots.
Yuanan Diao, Kennesaw State College
Claus Ernst, Western Kentucky University
Esaias J. Janse van Rensburg*, York University
(90965101)

9:30 a.m.
Equilateral polygonal knots.
Kenneth C. Millett*, University of California, Santa Barbara
(90957247)

10:00 a.m.
M\"obius energy of Hopf links and the Morse theory of electrons on $S^2$.
Robert Barnard Kusner*, University of Massachusetts, Amherst
John M. Sullivan, University of Minnesota, Minneapolis
James Lawrence, University of Massachusetts, Amherst
Nick Schmitt, University of Massachusetts, Amherst
(90957255)

10:30 a.m.
Discretizations of M\"obius knot energies.
John M. Sullivan*, University of Minnesota, Minneapolis
(90957254)

Saturday March 23, 1996, 8:00 a.m.10:50 a.m.
Special Session on Commutative Ring Theory, III
Room 256, Iowa Memorial Union/Iowa House
Organizers:
Daniel D. Anderson, University of Iowa

8:00 a.m.
The residue fields of a zerodimensional ring.
William J. Heinzer, Purdue University, West Lafayette
David C. Lantz*, Colgate University
Roger A. Wiegand, University of Nebraska, Lincoln
(90913252)

8:30 a.m.
Minimal generating sets for ideals in local domains.
Kurt D. Herzinger*, University of Nebraska, Lincoln
(90913116)

9:00 a.m.
The $S_2$fication of a commutative ring.
Joseph P. Brennan*, North Dakota State University
(90913118)

9:30 a.m.
Unique factorization of bonds and other cashflows.
Douglas L. Costa*, University of Virginia
(90913165)

10:00 a.m.
Characterizing when $R(X)$ is completely integrally closed.
Thomas G. Lucas*, University of North Carolina, Charlotte
(90913154)

10:30 a.m.
Properties of the projective line over the integers.
Aihua Li, Loyola University
Sylvia Margaret Wiegand*, University of Nebraska, Lincoln
(90913216)

Saturday March 23, 1996, 8:00 a.m.10:50 a.m.
Special Session on Research in Mathematics by Undergraduates
Room 259, Iowa Memorial Union/Iowa House
Organizers:
Carl C. Cowen, Purdue University, West Lafayette

8:00 a.m.
Informal discussion

8:30 a.m.
Elasticity of factorizations of power series.
Janice M. Winner*, University of Kentucky
(9091388)

9:00 a.m.
Improved bounds for the reliability of ddimensional consecutivekoutofn systems.
Laura Kay Potter*, University of Northern Iowa
(9096015)

9:30 a.m.
Redundant matrices for linear transformations.
Carl C. Cowen, Purdue University, West Lafayette
Daniel E. Crosby*, Purdue University, West Lafayette
(90915148)

10:00 a.m.
A graphdependent condition for a pattern of matrices allowing a line sum constant matrix.
Michael E. Holcomb*, Oklahoma State University, Stillwater
David P. Stanford, College of William & Mary
(90915229)

10:30 a.m.
Control of redundant robots.
Jason A. Aubrey*, Purdue University, West Lafayette
Carl C. Cowen, Purdue University, West Lafayette
Lorena I. Romero, Wellesley College
(90915147)

Saturday March 23, 1996, 8:30 a.m.10:50 a.m.
Special Session on Derivatives and Financial Mathematics, II
Room 337, Iowa Memorial Union/Iowa House
Organizers:
John F. Price, Maharishi International University

8:30 a.m.
On an interiorpoint columngeneration algorithm for stochastic financial optimization.
Yinyu Ye*, University of Iowa
(9099074)

9:00 a.m.
Pricing options when asset return follows a ``colored'' Brownian process.
Steven H. Zhu*, First National Bank of Chicago, Chicago, Illinois
(9099076)

9:30 a.m.
Path structure of the bond price process in the Heath, Jarrow, and Morton model.
Valery Alexandrovich Kholodnyi, Integrated Energy Services, Fairfield, Iowa
Milan N. Lukic*, University of Wisconsin, Milwaukee
(90960211)

10:00 a.m.
Testing the Heath, Jarrow and Morton model for interest rates.
Mukarram Attari*, University of Iowa
(9099078)

10:30 a.m.
Problem session

Saturday March 23, 1996, 8:30 a.m.10:50 a.m.
Special Session on Group Representations and Mathematical Physics, III
Room 301, Van Allen Hall
Organizers:
Tuong TonThat, University of Iowa

8:30 a.m.
Computing cohomology using covariant differential operators.
Ronald J. Stanke*, Baylor University
(90922158)

9:00 a.m.
Quantization of collective dynamics.
George Rosensteel*, Tulane University
(90922193)

9:30 a.m.
Algebras of growth one.
Efim Zelmanov*, Yale University
(90922270)

10:00 a.m.
$p$Adic Bessel functions and harmonic analysis.
Paul J. Sally, Jr.*, University of Chicago
(90922240)

10:30 a.m.
Current densities in relativistic fewbody systems.
F. Coester*, Argonne National Laboratories, Argonne, Illinois
(90981146)

Saturday March 23, 1996, 8:30 a.m.10:20 a.m.
Special Session on Geometry and Cohomology, III
Room 343, Iowa Memorial Union/Iowa House
Organizers:
Walter I. Seaman, University of Iowa

8:30 a.m.
On the incompleteness of Berger's list of holonomy representations.
Quoshin Chi*, Washington University
Sergey Merkulov, University of Glasgow, United Kingdom
Lorenz J. Schwachhoefer, University of Leipzig, Germany
(9095379)

9:00 a.m.
On symmetries of constant mean curvature surfaces.
Josef F. Dorfmeister*, University of Kansas
Guido Haak, Technical University of Berlin, Germany
(90953205)

9:30 a.m.
SeibergWitten invariants of complex surfaces with the reversed orientation.
Tedi C. Draghici*, Michigan State University
(9095768)

10:00 a.m.
Dupin hypersurfaces with four principal curvatures.
Gary R. Jensen*, Washington University
Thomas E. Cecil, College of the Holy Cross
(90953110)

Saturday March 23, 1996, 8:30 a.m.10:50 a.m.
Special Session on Topology of 3manifolds, III
Room 345, Iowa Memorial Union/Iowa House
Organizers:
Charles Frohman, University of Iowa
YingQing Wu, University of Iowa

8:30 a.m.
Dehn surgery.
C. M. Gordon*, University of Texas, Austin
(90957258)

9:00 a.m.
On mutatative $3$manifolds.
Yongwu Rong*, George Washington University
(9095760)

9:30 a.m.
The Kauffman bracket skein module and $SL_2(F)$ representations of $\pi(M)$.
Doug Bullock*, Boise State University
(9095754)

10:00 a.m.
Elementary moves on Heegaard diagrams.
Feng Luo*, Rutgers University, New Brunswick
(9095753)

10:30 a.m.
On graph manifolds.
Hyam Rubinstein, Melbourne University, Australia
Shicheng Wang*, Beijing University, People's Republic of China
Fengchun Yu, Beijing University, People's Republic of China
(9095763)

Saturday March 23, 1996, 8:30 a.m.10:50 a.m.
Special Session on Theta Correspondences and Automorphic Forms, II
Room 347, Iowa Memorial Union/Iowa House
Organizers:
David C. Manderscheid, University of Iowa

8:30 a.m.
Exceptional $\Theta$correspondences.
Kay Magaard*, Wayne State University
Gordan Savin, University of Utah
(9092250)

9:00 a.m.
Minimal representations, shared orbits and dual pair correspondences.
JingSong Huang*, Hong Kong University of Science and Technology, Hong Kong
(9092293)

9:30 a.m.
$K$types of minimal representations ($p$adic case).
Gordan Savin*, University of Utah
(9092249)

10:00 a.m.
Explicit models for small unitary representations.
Siddhartha Sahi*, Rutgers University, New Brunswick
(90922174)

10:30 a.m.
Coperiods.
S. Rallis*, Ohio State University, Columbus
(90911227)

Saturday March 23, 1996, 8:30 a.m.10:50 a.m.
Special Session on Geometric and Analytic Methods in Several Complex Variables, II
Room 257, Iowa Memorial Union/Iowa House
Organizers:
Franc Forstneric, University of Wisconsin, Madison

8:30 a.m.
An estimate on pseudoconvex boundaries.
Emil J. Straube*, Texas A & M University, College Station
(90932184)

9:00 a.m.
The CauchyRiemann equation on singular spaces.
John Erik Fornaess, University of Michigan, Ann Arbor
Estela A. Gavosto*, University of Michigan, Ann Arbor
(90932220)

9:30 a.m.
Divergence of the normalization for real Lagrangian surfaces near complex tangents.
Xianghong Gong*, Mathematical Sciences Research Institute, Berkeley
(9093221)

10:00 a.m.
Proper holomorphic mappings.
Victoria Pambuccian*, Indiana University, Bloomington
(90932199)

10:30 a.m.
The Ahlfors map and Szeg\H o kernel for an annulus.
Thomas J. Tegtmeyer, Purdue University, West Lafayette
Anthony D. Thomas*, University of Wisconsin, Platteville
(9093022)

Saturday March 23, 1996, 9:00 a.m.10:50 a.m.
Special Session on Arrangements of Hyperplanes, III
Room 351, Iowa Memorial Union/Iowa House
Organizers:
Michael J. Falk, Northern Arizona University
Richard C. Randell, University of Iowa

9:00 a.m.
Ordered configurations of roots of real polynomials.
Volkmar Welker*, Institute for Experimental Mathematics, Germany
(90957127)

9:30 a.m.
Homotopy theory of arrangements.
Richard C. Randell*, University of Iowa
(90952214)

10:00 a.m.
Intersection lattices of discriminantal arrangements.
Margaret M. Bayer*, University of Kansas
(90952178)

10:30 a.m.
Complex hyperplane arrangements.
Helene Barcelo*, Arizona State University
E. C. Ihrig, Arizona State University
(90952195)

Saturday March 23, 1996, 9:00 a.m.10:50 a.m.
Special Session on Nonlinear Partial Differential Equations, III
Room 341, Iowa Memorial Union/Iowa House
Organizers:
Lihe Wang, University of Iowa
Gerhard O. Strohmer, University of Iowa

9:00 a.m.
Weak continuity of multilinear operators and homogenization.
Sijue Wu*, Northwestern University
(90935263)

9:30 a.m.
The Plateau Problem for boundary curves with connectors.
Henry C. Wente*, University of Toledo
(90949250)

10:00 a.m.
Topological decomposition of Sobolev functions.
Ed W. Stredulinsky*, University of Wisconsin, Richland Center
Peter Michael Laurence, University of Rome La Sapienza, Italy
(90935261)

10:30 a.m.
Multidimensional diffusion waves for the NavierStokes equations of compressible flow.
David C. Hoff*, Indiana University, Bloomington
Kevin R. Zumbrun, Indiana University, Bloomington
(9093537)

Saturday March 23, 1996, 9:30 a.m.10:50 a.m.
Special Session on Current Issues in Nonlinear Conservation Laws, III
Room 253, Iowa Memorial Union/Iowa House
Organizers:
Suncica Canic, Iowa State University

9:30 a.m.
Mass conserving front tracking for miscible two phase flow.
Kou Kang Chang, Indiana University, Bloomington
W. Brent Lindquist*, State University of New York, Stony Brook
(9097640)

10:00 a.m.
Viscous shock profiles and postshock oscillations.
Smadar Karni*, Courant Institute of Mathematical Sciences, New York University
(90976137)

10:30 a.m.
A class of positive difference schemes for symmetrizable systems of conservation laws in any number of space dimensions.
Peter D. Lax*, Courant Institute of Mathematical Sciences, New York University
XuDong Liu, Courant Institute of Mathematical Sciences, New York University
(9097697)

Saturday March 23, 1996, 11:00 a.m.11:50 a.m.
Invited Address
Unique continuation for solutions to partial differential equations.
Auditorium, Pappajohn Business Administration Building
Daniel I. Tataru*, Northwestern University
(9093503)

Saturday March 23, 1996, 1:30 p.m.2:50 p.m.
Invited Address
Rotation sets in dynamical systems.
Auditorium, Pappajohn Business Administration Building
Michal Misiurewicz*, Indiana UniversityPurdue University, Indianapolis
(9095402)

Saturday March 23, 1996, 2:30 p.m.6:50 p.m.
Special Session on Mostly Finite Geometries, IV
Room 335, Iowa Memorial Union/Iowa House
Organizers:
Norman L. Johnson, University of Iowa

2:30 p.m.
Informal discussion

3:00 p.m.
Quasiregular collineation groups and related Schur rings.
Yutaka Hiramine*, University of Iowa
(9095191)

3:30 p.m.
Partial geometries and Steiner designs.
Vladimir D. Tonchev*, Michigan Technological University
(90951119)

4:00 p.m.
Blueprints for classical quadrangles and hexagons.
Michael Andrew Abramson*, Bowling Green State University
(90951225)

4:30 p.m.
The Terwilliger algebra of a generalized quadrangle.
Sylvia A. Hobart*, University of Wyoming
(90905231)

5:00 p.m.
Classification results for ovoids in $O_8^{+}(q)$.
Athula Gunawardena*, Wayne State College
(9090532)

5:30 p.m.
Morphisms of buildings and related geometries.
Peter M. Johnson*, University of London, United Kingdom
(90951248)

6:00 p.m.
Informal discussion

Saturday March 23, 1996, 2:30 p.m.6:20 p.m.
Special Session on Group Representations and Mathematical Physics, IV
Room 301, Van Allen Hall
Organizers:
Tuong TonThat, University of Iowa

2:30 p.m.
Geometry and analysis on nonconvex tubes.
Simon G. Gindikin*, Rutgers University, New Brunswick
(90922183)

3:00 p.m.
Invariant theory and the oscillator representation.
Kenneth I. Gross*, University of Vermont
(90922188)

3:30 p.m.
Nonlinear dynamical systems which are not integrable.
Robert Gilmore*, Drexel University
(90922222)

4:00 p.m.
Group representation theory, number theory and wavelet inverse theory.
Brian DeFacio*, University of Missouri, Columbia
Jon A. Sjogren, Bolling AFB, District of Columbia
(9092083)

4:30 p.m.
Laws of trigonometry in symmetric spaces.
Helmer Aslaksen*, National University of Singapore, Singapore
HsuehLing Huynh, AT&T Research, Murray Hill, New Jersey
(90953166)

5:00 p.m.
Generalised Casimir operators.
Helmer Aslaksen, National University of Singapore, Singapore
EngChye Tan, National University of Singapore, Singapore
ChenBo Zhu*, National University of Singapore, Singapore
(90917142)

5:30 p.m.
A new set of operatorvalued Bessel functions.
Hongming Ding*, Saint Louis University
(90922151)

6:00 p.m.
On some reciprocity theorems for infinitedimensional dual pairs of groups.
Tuong TonThat*, University of Iowa
(90922208)

Saturday March 23, 1996, 2:30 p.m.6:20 p.m.
Special Session on Commutative Ring Theory, IV
Room 256, Iowa Memorial Union/Iowa House
Organizers:
Daniel D. Anderson, University of Iowa

2:30 p.m.
Factorization in rings and modules.
Daniel D. Anderson, University of Iowa
Silvia ValdesLeon*, University of Southern Maine
(90913145)

3:00 p.m.
Cohomological varieties, lifting, and Tor on a complete intersection.
David Allen Jorgensen*, University of Nebraska, Lincoln
(90913117)

3:30 p.m.
Ideals of integervalued polynomial rings.
Alan Loper*, Ohio State University, Newark
(90913123)

4:00 p.m.
A strictly algebraic approach to the Jacobian Conjecture.
Eloise Ann Hamann*, San Jose State University
(9091328)

4:30 p.m.
Gaussian polynomials and content ideals.
William J. Heinzer*, Purdue University, West Lafayette
Craig L. Huneke, Purdue University, West Lafayette
(90913143)

5:00 p.m.
Gaussian polynomials and content invertibility.
Sarah Glaz*, University of Connecticut, Storrs
(9091323)

5:30 p.m.
The depth of a tensor product of modules.
Craig L. Huneke, Purdue University, West Lafayette
Roger A. Wiegand*, University of Nebraska, Lincoln
(90913140)

6:00 p.m.
An intersection condition for prime ideals.
Robert Gilmer*, Florida State University
(9091344)

Saturday March 23, 1996, 3:00 p.m.6:20 p.m.
Special Session on Moments and Operators, IV
Room 348, Iowa Memorial Union/Iowa House
Organizers:
Raul E. Curto, University of Iowa
Palle E. T. Jorgensen, University of Iowa
Paul S. Muhly, University of Iowa

3:00 p.m.
A general maximum entropy principle in time varying interpolation theory.
Ciprian Ilie Foias*, Indiana University, Bloomington
Arthur E. Frazho, Purdue University, West Lafayette
(90947266)

3:30 p.m.
On the multiplication of free $n$tuples of noncommutative random variables.
Alexandru M. Nica*, University of Michigan, Ann Arbor
Roland Speicher, University of Heidelberg, Germany
(90947212)

4:00 p.m.
Trigonometric moment problems for arbitrary finite subsets of $\bold Z^n$.
JeanPierre Gabardo*, McMaster University
(90942197)

4:30 p.m.
The operator of Foias and Williams: Some algebraic properties.
Srdjan Petrovic*, Indiana University, Bloomington
(90947218)

5:00 p.m.
Estimates for Banach space norms in the von Neumann algebras in the Berezin quantization of Riemann surfaces.
Florin Radulescu*, University of Iowa
(90947246)

5:30 p.m.
Multidimensional spectral theory of noncommuting operators.
Vladimir V. Kisil*, University Nacional Autonoma de Mexico, Mexico
(9094785)

6:00 p.m.
FourierStieltjes algebras of locally compact groupoids.
Martin E. Walter*, University of Colorado, Boulder
(90943103)

Saturday March 23, 1996, 3:00 p.m.5:20 p.m.
Special Session on Arrangements of Hyperplanes, IV
Room 351, Iowa Memorial Union/Iowa House
Organizers:
Michael J. Falk, Northern Arizona University
Richard C. Randell, University of Iowa

3:00 p.m.
Topology of the complements and geometry of finite sets of points.
Anatoly S. Libgober*, University of Illinois, Chicago
(90914186)

3:30 p.m.
Infinite arrangements and cohomology of $SL_n(Z)$.
Yining Xia*, Northern Illinois University
(9095541)

4:00 p.m.
Perversity, duality, and arrangements in $\Bbb C^3$.
David B. Massey*, Northeastern University
(90932171)

4:30 p.m.
Braid monodromy of arrangements and representations of braid groups.
Daniel C. Cohen, Louisiana State University, Baton Rouge
Alexandru I. Suciu*, Northeastern University
(90920239)

5:00 p.m.
Informal discussion

Saturday March 23, 1996, 3:00 p.m.6:20 p.m.
Special Session on Physical Knot Theory, IV
Room 346, Iowa Memorial Union/Iowa House
Organizers:
Jonathan K. Simon, University of Iowa
Gregory Buck, Saint Anselm's College

3:00 p.m.
Energy minimizing knots in $S^3$ and $H^3$.
Jun O'Hara*, Tokyo Metropolitan University,
(90957253)

3:30 p.m.
On the energy and length of a knot.
Gregory Buck*, Saint Anselm's College
(90957224)

4:00 p.m.
Magnetic flux tubes, elastic rods and uniformly charged loops.
Atta Y.K Chui*, University of Cambridge, United Kingdom
H. K. Moffatt, University of Cambridge, United Kingdom
(90957267)

4:30 p.m.
Cutting the knot: Reconnection in superfluids, dislocations, and flood plains.
Klaus Schwarz*, IBM T. J. Watson Research Center, Yorktown Heights, New York
(90957221)

5:00 p.m.
Knotted and linked periodic solutions to ordinary differential equations.
Robert W. Ghrist*, Cornell University
(90957228)

5:30 p.m.
Results on harmonic knots.
Aaron Keith Trautwein*, Carthage College
(90957152)

6:00 p.m.
The thickness of knots.
Rick Litherland*, Louisiana State University, Baton Rouge
Oguz C. Durumeric, University of Iowa
Jonathan K. Simon, University of Iowa
(90957269)

Saturday March 23, 1996, 3:00 p.m.5:20 p.m.
Special Session on Geometry and Cohomology, IV
Room 343, Iowa Memorial Union/Iowa House
Organizers:
Walter I. Seaman, University of Iowa

3:00 p.m.
Dirac operators on Clifford bundles and jointly seminormal spectra.
Mircea Martin*, University of Kansas
(90958213)

3:30 p.m.
Minimal orbits of metrics and applications.
Yoshiaki Maeda, Keio University, Japan
Steven Rosenberg, Boston University
Philippe Tondeur*, University of Illinois, UrbanaChampaign
(9095867)

4:00 p.m.
On SeibergWitten solutions.
Shuguang Wang*, University of Missouri, Columbia
(90957215)

4:30 p.m.
On the dressing action of loop groups on harmonic maps.
Hongyou Wu*, Northern Illinois University
(90953104)

5:00 p.m.
Geodesic length functions and cohomology of mapping class groups.
Yining Xia*, Northern Illinois University
(9095529)

Saturday March 23, 1996, 3:00 p.m.5:20 p.m.
Special Session on Topology of 3manifolds, IV
Room 345, Iowa Memorial Union/Iowa House
Organizers:
Charles Frohman, University of Iowa
YingQing Wu, University of Iowa

3:00 p.m.
Incompressible surfaces in knot exteriors.
Marc E. Culler, University of Illinois, Chicago
Peter B. Shalen*, University of Illinois, Chicago
(90957207)

3:30 p.m.
The Burau representations modulo $2$.
Daryl Cooper, University of California, Santa Barbara
David Darren Long*, University of California, Santa Barbara
(9095757)

4:00 p.m.
Minimal cusp lengths in hyperbolic $3$manifolds.
Colin C. Adams*, Williams College
(9095725)

4:30 p.m.
Almost normal surfaces in $3$manifolds.
Michelle M. Stocking*, University of California, Davis
(9095758)

5:00 p.m.
Rank, Heegaard genus, and the Meridional generator conjecture.
Steven A. Bleiler*, Portland State University
Amelia Jones, Vassar College
(90954141)

Saturday March 23, 1996, 3:00 p.m.4:50 p.m.
Special Session on Nonlinear Partial Differential Equations, IV
Room 337, Iowa Memorial Union/Iowa House
Organizers:
Lihe Wang, University of Iowa
Gerhard O. Strohmer, University of Iowa

3:00 p.m.
A transonic flow problem.
Yuxi Zheng*, Indiana University, Bloomington
(90982124)

3:30 p.m.
NavierStokes equations in thin three dimensional domains with various boundary conditions.
Roger Temam, Indiana University, Bloomington
Mohammed B. Ziane*, Indiana University, Bloomington
(90935167)

4:00 p.m.
Headmedia interaction in magnetic recording.
Avner Friedman, University of Minnesota, Minneapolis
Bei Hu*, University of Notre Dame
(9093510)

4:30 p.m.
Compressible flows under the influence of gravity.
Gerhard O. Strohmer*, University of Iowa
Wojciech M. Zajaczkowski, Academy of Science, Poland
(90935161)

Saturday March 23, 1996, 3:00 p.m.4:50 p.m.
Special Session on Current Issues in Nonlinear Conservation Laws, IV
Room 253, Iowa Memorial Union/Iowa House
Organizers:
Suncica Canic, Iowa State University

3:00 p.m.
Remarks on Mach configurations for the smalldisturbance equation.
Cathleen S. Morawetz*, Courant Institute of Mathematical Sciences, New York University
(90976109)

3:30 p.m.
Steady states of the VlasovPoissonFokkerPlanck system.
Robert T. Glassey, Indiana University, Bloomington
John W. Schaeffer, Carnegie Mellon University
Yuxi Zheng*, Indiana University, Bloomington
(90982126)

4:00 p.m.
A numerical method for a freeboundary problem arising in weak shock reflection.
Dragan Mirkovic*, Iowa State University
Suncica Canic, Iowa State University
(90976120)

4:30 p.m.
Diffraction of weak shocks: Linear and weakly nonlinear scalings.
Esteban G. Tabak*, Courant Institute of Mathematical Sciences, New York University
Ruben R. Rosales, Massachusetts Institute of Technology
(90976128)

Saturday March 23, 1996, 3:00 p.m.5:50 p.m.
Special Session on Theta Correspondences and Automorphic Forms, III
Room 347, Iowa Memorial Union/Iowa House
Organizers:
David C. Manderscheid, University of Iowa

3:00 p.m.
Minimal representations of exceptional $p$adic groups.
Karl E. Rumelhart*, Ohio State University, Columbus
(90911194)

3:30 p.m.
The minimal representation of $SO(4,3)$ over a local nonarchimedian field.
Julie Rina Roskies*, Stanford University
(90911173)

4:00 p.m.
Theta representations and the RankinSelberg method.
Daniel Willis Bump*, Stanford University
(90911200)

4:30 p.m.
A remark on certain periods on $GL(4)$.
Masaaki Furusawa*, Johns Hopkins University
(90911192)

5:00 p.m.
The SeigelWeil formula for the metaplectic group.
W. Jay Sweet, Jr.*, Florida International University
(90922203)

5:30 p.m.
A CauchyHarishChandra integral.
Tomasz Przebinda*, University of Oklahoma
(90922169)

Saturday March 23, 1996, 3:00 p.m.4:25 p.m.
General Session
Room 341, Iowa Memorial Union/Iowa House

3:00 p.m.
Peano postulates for a finite set.
Jack M. Anderson*, South Dakota State University
Sam F. Adli, South Dakota State University
(90903236)

3:15 p.m.
Frobenius matrix approximation with linearly singular values.
Yves Nievergelt*, Eastern Washington University
(9091589)

3:30 p.m.
Propagation of wedgeextendibility by geometric methods.
Charles A. Pehlivanian*, United States Military Academy
(9093233)

3:45 p.m.
Approximation properties of a strongly nonlinear boundaryvalue problem on unbounded domains.
Michael D. Marcozzi*, United States Military Academy
(9093586)

4:00 p.m.
Infinite bump solutions of nonlinear Schr\"odinger equations.
Neeza Thandi*, Dalhousie University
(90935185)

4:15 p.m.
A numerical clustering algorithm and some results on convexity.
Richard Andrew Holley, University of Colorado, Boulder
Jerome I. Malitz, University of Colorado, Boulder
Seth M. Malitz*, Evolving Systems, Incorporated, Boulder, Colorado
(90968129)
Inquiries: meet@ams.org