AMS Sectional Meeting Full Program
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Inquiries: meet@ams.org
1992 Spring Southeastern Section Meeting
Tuscaloosa, AL, March 1314, 1992
Meeting #872
Associate secretaries:
Joseph A Cima, AMS
cima@email.unc.edu
Friday March 13, 1992

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Spectral Theory of Ordinary and Partial Differential Operators, I
Thames, Bryant Conference Center

9:00 a.m.
Poincare and Friedrichs inequalities in Banach function spaces.
David Edmunds*, University of Sussex, England
(87235116)

9:30 a.m.
Inverse problems for fractal drums.
Jacqueline Fleckinger*, University of Toulouse I, France
Dimtri Vasilev, University of Sussex, England
(8723569)

10:00 a.m.
Algebraic bounds on eigenvalue gaps.
Evans M. Harrell, II*, Georgia Institute of Technology
(8723595)

10:30 a.m.
Selfadjointness for the Weyl problem under an energy norm.
Allan M. Krall*, Pennsylvania State University, University Park
(8723412)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Infintite groups and group rings, I
Mobile, Bryant Conference Center

9:00 a.m.
Property sigma in groups.
James C. Beidleman*, University of Kentucky
D. J. S. Robinson, University of Illinois, UrbanaChampaign
(8722003)

9:30 a.m.
Insolvable 5rewritable groups.
Russell D. Blyth*, Saint Louis University
Derek J. S. Robinson, University of Illinois, UrbanaChampaign
(8722079)

10:00 a.m.
Computer investigations in group rings.
Donald B. Coleman*, University of Kentucky
(8722022)

10:30 a.m.
On HNNgroups whose three generator subgroups are free.
Benjamin Fine*, Fairfield University
Frank Roehl, University of Alabama, Tuscaloosa
Gerhard Rosenberger, University of Dortmund, Germany
(87220103)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Combinatorial Problems on Partially Ordered Sets, I
Central, Bryant Conference Center

9:00 a.m.
Matchings in the partition lattice.
E. Rodney Canfield*, University of Georgia
(87206120)

9:30 a.m.
Graphs and posets.
S. T. Hedetniemi, Clemson University
Renu Laskar*, Clemson University
(8720566)

10:00 a.m.
On dimension in the cube.
Glenn H. Hurlbert*, Arizona State University
(8720660)

10:30 a.m.
Some variations on Winkler's rneighborhood problem.
David P. Jacobs*, Clemson University
(8720381)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Operator Algebras, I
RastaA, Bryant Conference Center

9:00 a.m.
The convolution algebra of a quantum group.
Edward G. Effros*, University of California, Los Angeles
ZhongJin Ruan, University of Illinois, UrbanaChampaign
(87246132)

10:00 a.m.
On singly generated operator algebras.
Edward A. Azoff*, University of Georgia
Hasan Shehada, Southern Arkansas University
(87247133)

10:30 a.m.
Triangular UHF algebras over arbitrary fields.
Richard L. Baker*, University of Iowa
(8724757)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Geometric Topology, I
Birmingham, Bryant Conference Center

9:00 a.m.
A triple point formula for knotted surface.
J. Scott Carter*, University of South Alabama
Masahiko Saito, University of Texas, Austin
(8725747)

9:30 a.m.
3manifolds with geometric structure and approximate fibrations.
Robert J. Daverman*, University of Tennessee, Knoxville
(8725707)

10:00 a.m.
A maximally pathological Brouwer homeomorphism.
Edward Warwick Daw*, University of California, Los Angeles
(87258110)

10:30 a.m.
Attractors of iterated function systems.
P. F. Duvall*, University of North Carolina, Greensboro
L. S. Husch, University of Tennessee, Knoxville
(8725428)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis and Related Topics, I
Mason, Bryant Conference Center

9:00 a.m.
On the T(1) theorem on product domains.
Josefina Alvarez*, New Mexico State University
(8724237)

9:30 a.m.
The area conjecture for plane Q.C. mappings.
Albert Baernstein, II*, Washington University
(8723087)

10:00 a.m.
Martingale transforms and Hardy spaces.
J.A. Chao*, Cleveland State University
R.L. Long, Academia Sinica, People's Republic of China
(8724219)

10:30 a.m.
Singular integrals with highly oscillating kernels on the product domains.
LungKee Chen*, Oregon State University
(8724251)

Friday March 13, 1992, 9:00 a.m.10:50 a.m.
Special Session on Approximation Theory: Modern Methods, I
Logan, Bryant Conference Center

9:00 a.m.
Wavelet operators in approximation and probability.
George Anastassiou*, Memphis State University
(8724113)

9:30 a.m.
nwidths in Hilbert spaces of analytic functions.
Stephen D. Fisher*, Northwestern University
(8724139)

10:00 a.m.
Pages from the computer files of R. William Gosper.
M. E. H. Ismail*, University of South Florida
Y. Takeuchi, National University of Columbia, Columbia
R. Zhang, University of South Florida
(87233100)

10:30 a.m.
Simultaneous approximation of functions and their derivatives by linear projections.
Theodore Kilgore*, Auburn University, Auburn
(8724186)

Friday March 13, 1992, 1:00 p.m.2:00 p.m.
Invited Address
Linear extensions of partially ordered sets.
RastaA, Bryant Conference Center
Peter M. Winkler*, Bellcore, New Jersey
(8720676)

Friday March 13, 1992, 2:10 p.m.4:30 p.m.
Special Session on Infintite groups and group rings, II
Mobile, Bryant Conference Center

2:10 p.m.
The combinatorial structure of some infinite groups related to finite simple groups.
Thomas A. Fournelle*, University of Wisconsin, Parkside
Kenneth W. Weston, University of Wisconsin, Parkside
(8722004)

2:40 p.m.
The universal theory of free groups.
Anthony M. Gaglione*, United States Naval Academy
Dennis Spellman, Philadelphia, Pennsylvania
(8722077)

3:10 p.m.
Automorphisms and primitivity of relatively free gorups.
C. Kanta Gupta*, University of Manitoba
(8722009)

3:40 p.m.
Dimension quotients of arbitrary groups.
Narain Gupta*, University of Manitoba
(8722008)

4:10 p.m.
Integral group rings of finite representation type.
Lee Klingler*, Florida Atlantic University
Jeremy Haefner, University of Colorado
(8721691)

Friday March 13, 1992, 2:10 p.m.4:00 p.m.
Special Session on Ergodic Theory and Dynamical Systems, I
Thames, Bryant Conference Center

2:10 p.m.
A positive entropy annulus homeomorphism without periodic points.
F. Botelho*, Memphis State University
(8725845)

2:40 p.m.
The dynamics of continuous maps on onedimensional manifolds through inverse limits.
Marcy Barge, Montana State University
Beverly Diamond*, College of Charleston
(8725858)

3:10 p.m.
Universal zero sets for sequenceentropy.
Jonathan King*, University of Florida
(8722861)

3:40 p.m.
Restricted orbit equivalence for Z^dactions.
Janet Kammeyer, United States Naval Academy
Daniel Rudolph*, University of Maryland, College Park
(87260124)

Friday March 13, 1992, 2:10 p.m.5:00 p.m.
Special Session on Combinatorial Problems on Partially Ordered Sets, II
Central, Bryant Conference Center

2:10 p.m.
Bipartitions and products of Young lattices.
David Robinson*, Guilford College
(8720629)

2:40 p.m.
Phase transitions in partially ordered sets.
Bruce L. Rothschild*, University of California, Los Angeles
Peter M. Winkler, Bellcore, New Jersey
(87205118)

3:10 p.m.
Generating linear extensions fast.
Gara Pruesse, University of Toronto
Frank Ruskey*, University of Victoria
(87205112)

3:40 p.m.
Monotone gray codes.
Carla D. Savage*, North Carolina State University
Peter M. Winkler, Bellcore, New Jersey
(87206122)

4:10 p.m.
Posets with large dimension and relatively few critical pairs.
Peter C. Fishburn, AT&T Bell Laboratories, Murray Hill, New Jersey
William T. Trotter*, Bell Communications Research, New Jersey
(87206123)

4:40 p.m.
A basis for the homology of ddivisible partition lattices.
Michelle L. Wachs*, University of Miami
(87205113)

Friday March 13, 1992, 2:10 p.m.5:00 p.m.
Special Session on Operator Algebras, II
RastaA, Bryant Conference Center

2:10 p.m.
The crossed products of operatoralgebras by operator convolution algebras.
Edward G. Effros, University of California, Los Angeles
ZhongJin Ruan*, University of Illinois, UrbanaChampaign
(8724673)

2:40 p.m.
Morita equivalence of operator algebras.
David Blecher*, University of Houston, Downtown
Paul Muhly, University of Iowa
Vern Paulsen, University of Houston, Downtown
(8724689)

3:10 p.m.
Spectra for compact group actions.
Elliot C. Gootman*, University of Georgia
Aldo J. Lazar, Tel Aviv University, Israel
Costel Peligrad, University of Cincinnati
(8724654)

3:40 p.m.
Recent results on operator means.
William L. Green*, Georgia Institute of Technology
(8724683)

4:10 p.m.
Joinirreducibility of ideals in triangular UHF algebras.
Timothy D. Hudson*, Texas A\thsp\&\thsp M University, College Station
(8724680)

4:40 p.m.
Operator equations in CSL algebras.
Elias G. Katsoulis*, University of Alabama, Tuscaloosa
(8724736)

Friday March 13, 1992, 2:10 p.m.5:00 p.m.
Special Session on Geometric Topology, II
Birmingham, Bryant Conference Center

2:10 p.m.
Complexes that arise in cohomological dimension theory: A unified approach.
Jerzy Dydak*, University of Tennessee, Knoxville
John J. Walsh, University of California, Riverside
(8725416)

2:40 p.m.
A higher Euler characteristic.
Ross Geoghegan*, State University of New York, Binghamton
Andrew Nicas, McMaster University
(8725782)

3:10 p.m.
Arrangements of real algebraic curves.
Patrick M. Gilmer*, Louisiana State University
(8725706)

3:40 p.m.
Noncollarable ends of 4manifolds.
Craig R. Guilbault*, University of Wisconsin, Milwaukee
(8725750)

4:10 p.m.
A space version of the BassHellerSwan formula.
Bruce Hughes*, Vanderbilt University
Stratos Prassidis, Vanderbilt University
(8725740)

4:40 p.m.
Topological characterizations of iterated function systems of [0,1] and covering maps of the 1sphere.
P. F. Duvall, University of North Carolina, Greensboro
L. S. Husch*, University of Tennessee, Knoxville
(8725427)

Friday March 13, 1992, 2:10 p.m.5:35 p.m.
General Session
Mason, Bryant Conference Center

2:10 p.m.
The symmetric genus of Kmetacyclic groups.
Coy L. May, Towson State University
Jay Zimmerman*, Towson State University
(87220137)

2:25 p.m.
Fair cost allocation on a parallel processor.
David C. Fisher*, University of Colorado, Denver
Daniel C. Burnett, University of Colorado, Denver
Patricia D. Jungers, University of Colorado, Denver
(8722030)

2:40 p.m.
An equivalence theorem for finite abelian groups.
Paul Hill*, Auburn University, Auburn
(8722078)

2:55 p.m.
Subsocles supporting isotype and balanced subgroups.
Paul Hill, Auburn University, Auburn
Charles Megibben*, Vanderbilt University
(8722093)

3:10 p.m.
Division space axiomatics.
Krzysztof Ostaszewski*, University of Louisville
(8722802)

3:25 p.m.
On weakly mixing tranformations and weakly wandering partitions.
Karin ReinholdLarsson*, University of Toronto
Andres del Junco, University of Toronto
(87228121)

3:40 p.m.
On existence of solutions for systems of functional differential equations with singular coefficient matrices.
Josaphat A. Uvah*, University of West Florida
(87234114)

3:55 p.m.
Multiplier transformations on Hardy spaces.
Dashan Fan*, University of Wisconsin, Milwaukee
(8724232)

4:10 p.m.
Ktheory for certain reduced free products of C*algebras.
Kevin McClanahan*, University of Mississippi
(8724753)

4:25 p.m.
On star with Lindelof center property.
G. R. Hiremath*, Talladega College
(8725471)

4:40 p.m.
Limiting notions of the IP type in the enveloping semigroup.
Kamel N. Haddad*, University of Maryland, College Park
(8725474)

4:55 p.m.
Enhanced cohomology groups and obstruction theory.
Marek A. Galecki*, University of Tennessee, Knoxville
(8725542)

5:10 p.m.
A singularly perturbed stochastic delay system with a small parameter.
K. M. Ramachandran*, University of South Florida
(8726034)

5:25 p.m.
Bivariate extreme value distributions.
Maged Elshamy*, University of Alabama, Huntsville
(8726298)

Friday March 13, 1992, 11:00 p.m.12:00 p.m.
Invited Address
Invariant measures for noninvertible maps.
RastaA, Bryant Conference Center
Jane M. Hawkins*, University of North Carolina, Chapel Hill
(8722875)
Saturday March 14, 1992

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Spectral Theory of Ordinary and Partial Differential Operators, II
Thames, Bryant Conference Center

9:00 a.m.
On the completeness of wave operators under loss of local compactness.
Rainer Hempel*, University of Munich, Germany
Ricardo Weder, University of Mexico
(8723543)

9:30 a.m.
Absolutely continuous spectra of SturmLiouville equations.
Don Hinton*, University of Tennessee, Knoxville
Stephen Clark, University of Missouri, Rolla
(8723448)

10:00 a.m.
Regularity of solutions for singular Schrodinger equations.
Andreas M. Hinz*, University Munchen, Germany
(8723517)

10:30 a.m.
Symmetry results for positive solutions of reactiondiffusion equations.
Hans G. Kaper*, Argonne National Laboratory
Man Kam Kwong, Argonne National Laboratory
Yi Li, Argonne National Laboratory
(87235117)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Infintite groups and group rings, III
Mobile, Bryant Conference Center

9:00 a.m.
Endomorphisms of negatively curved triangles of groups.
John Meier*, Cornell University
(8722085)

9:30 a.m.
The automorphism group of a virtual direct product of groups.
Martin R. Pettet*, University of Toledo
(8722046)

10:00 a.m.
Locally solvable finitary linear groups.
Richard E. Phillips*, Michigan State University
(8722001)

10:30 a.m.
A characterization of infinite polynilpotent groups.
Akbar Rhemtulla*, University of Alberta
Howard Smith, Bucknell University
(8722090)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Combinatorial Problems on Partially Ordered Sets, III
Central, Bryant Conference Center

9:00 a.m.
Angle orders.
Robert E. Jamison*, Clemson University
(87206108)

9:30 a.m.
Entropy and sorting.
Jeff Kahn, Rutgers University, New Brunswick
Jeong Han Kim*, Rutgers University, New Brunswick
(8720696)

10:00 a.m.
About the partition relation on infinite posets.
Gregory McColm*, University of South Florida
(8720462)

10:30 a.m.
The word problem in slim varieties.
John Pedersen*, University of South Florida
(87208106)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Operator Algebras, III
RastaA, Bryant Conference Center

9:00 a.m.
Structuredembedding TAF algebras.
David R. Larson*, Texas A\thsp\&\thsp M University, College Station
Alan Hopenwasser, University of Alabama
(8724663)

9:30 a.m.
On radicals of triangular operator algebras.
Laura Mastrangelo*, University of Puerto Rico, Puerto Rico
(8724720)

10:00 a.m.
An operator algebra approach to the Fourier transform on the torus.
Richard Mercer*, Wright State University
(8724797)

10:30 a.m.
Some problems and new results in nonselfadjoint operator algebras.
John L. Orr*, University of Nebraska, Lincoln
(87247125)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Geometric Topology, III
Birmingham, Bryant Conference Center

9:00 a.m.
The Nielsen number as an isotopy invariant.
Michael Kelly*, University of Idaho
(8725711)

9:30 a.m.
Nonsmoothable locally linear actions on a contractible 4manifold.
S\l awomir Kwasik, Tulane University
Terry Lawson*, Tulane University
(8725724)

10:00 a.m.
Signature invariants.
Jerome Levine*, Brandeis University
(8725792)

10:30 a.m.
A formula for the equivariant topological torsion of a fiber homotopy equivalence.
Stratos Prassidis*, Vanderbilt University
(8725741)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Harmonic Analysis and Related Topics, II
Mason, Bryant Conference Center

9:00 a.m.
Operators on the weighted special atom spaces.
Geraldo De Souza*, Auburn University, Auburn
(8724252)

9:30 a.m.
Cauchy integral and analytic capacity.
X. Fang*, Washington University
(8724249)

10:00 a.m.
Interpolation between weighted Hardy spaces.
Michael Cwikel, TechnionIsrael Institute of Technology, Israel
John E. McCarthy*, Washington University
Thomas H. Wolff, California Institute of Technology
(8724626)

10:30 a.m.
Multipliers with natural local spectrum and applications to convolution operators.
Michael M. Neumann*, Mississippi State University
(8724321)

Saturday March 14, 1992, 9:00 a.m.10:50 a.m.
Special Session on Approximation Theory: Modern Methods, II
Logan, Bryant Conference Center

9:00 a.m.
Quasiconformality of complex planar spline interpolants.
H. P. Dikshit, R. D. University India
Bernd Lange*, Auburn University, Auburn
R. A. Zalik, Auburn University, Auburn
(87241131)

9:30 a.m.
On inner approximationsolvability of nonlinear equations.
Ram N. Mohapatra*, University of Central Florida
(8724155)

10:00 a.m.
Convergence of Newtonlike methods for singular operator equations using outer inverses.
M. Zuhair Nashed*, University of Delaware
(87265130)

10:30 a.m.
Spectral extrapolation and limited angle tomography.
Timothy Edward Olson*, Dartmouth College
(87241129)

Saturday March 14, 1992, 11:00 a.m.12:00 p.m.
Invited Address

Saturday March 14, 1992, 1:00 p.m.2:00 p.m.
Invited Address

Saturday March 14, 1992, 2:10 p.m.6:00 p.m.
Special Session on Spectral Theory of Ordinary and Partial Differential Operators, III
Thames, Bryant Conference Center

2:10 p.m.
Weighted Friedrichs inequalities in amalgams.
Hans Heinig*, McMaster University
Alois Kufner, Czechoslovakia Akademy of Sciences, Czechoslovakia
(8722618)

2:40 p.m.
Multiplicity results for nonlinear Dirichlet problems.
Man Kam Kwong*, Argonne National Laboratory
(87234115)

3:10 p.m.
Stability analysis of positive solutions to semipositone problems.
Ratnasingham Shivaji*, Mississippi State University
(8723594)

3:40 p.m.
Approximation of isolated eigenvalues of ordinary differential operators.
G\"unter Stolz*, University of California, Los Angeles
Joachim Weidmann, J. W. GoetheUniversitat, Germany
(8723459)

4:10 p.m.
A proof of a logarithmic Sobolev inequality.
Giorgio Talenti*, University of Florence, Italy
(8724688)

4:40 p.m.
A general approach to the polynomial solutions of differential equations.
A. Turbiner*, University de Luminy, France
(87234119)

5:10 p.m.
Discrete inequalities, orthogonal polynomials and the spectral theory of difference operator.
W. D. Evans*, University of Wales College of Cardiff, United Kingdom
(87235134)

5:40 p.m.
Numerical estimation of the TitchmarshWeylmfunction.
B. M. Brown*, University of Wales, United Kingdom
(87235136)

Saturday March 14, 1992, 2:10 p.m.3:30 p.m.
Special Session on Infintite groups and group rings, IV
Mobile, Bryant Conference Center

2:10 p.m.
Factorizations by Abelian subgroups.
Derek J. S. Robinson*, University of Illinois, UrbanaChampaign
E. Stonehewer, University of Warwick, England
(8722023)

2:40 p.m.
Maximal subgroups of infinite symmetric groups.
Simon Thomas*, Rutgers University, New Brunswick
(8722067)

3:10 p.m.
Direct factor theorems for commutative group algebras.
William Ullery*, Auburn University, Auburn
(8722010)

Saturday March 14, 1992, 2:10 p.m.5:00 p.m.
Special Session on Ergodic Theory and Dynamical Systems, II
Central, Bryant Conference Center

2:10 p.m.
Nonsingular Kautomorphisms and exact endomorphisms.
C. E. Silva*, Williams College
(87228111)

2:40 p.m.
Entropy of snakes and a restricted variational principle.
Michal Misiurewicz, University of Warsaw, Poland and Princeton University
Juan Tolosa*, Stockton State College
(87258104)

3:10 p.m.
Random samplings of flows.
Mate Wierdl*, University of North Carolina, Chapel Hill
(87228109)

3:40 p.m.
Dimension group constraints for factors of sofic shifts.
Susan Williams*, University of South Alabama
(87254105)

4:10 p.m.
Generic results for cocycles in a semidirect product.
Karma Dajani*, University of South Alabama
(8722844)

Saturday March 14, 1992, 2:10 p.m.5:00 p.m.
Special Session on Operator Algebras, IV
RastaA, Bryant Conference Center

2:10 p.m.
A fixedpoint theorem for amenable C*algebras.
Alan Paterson*, University of Mississippi
(8724614)

2:40 p.m.
Certain representations of TAF algebras.
Justin R. Peters*, Iowa State University
(8724668)

3:10 p.m.
Some examples and problems concerning stability of commutative subspace lattices.
David R. Pitts*, University of Nebraska, Lincoln
(87247126)

3:40 p.m.
Ideal structure in the Haagerup tensor product of C*algebras.
Steven Allen, University of Edinburgh, Scotland
Allan Sinclair, University of Edinburgh, Scotland
Roger Smith*, Texas A\thsp\&\thsp M University, College Station
(8724672)

4:10 p.m.
Reflexive subalgebras of AF algebras.
Justin R. Peters, Iowa State University
Warren R. Wogen*, University of North Carolina, Chapel Hill
(8724625)

4:40 p.m.
Homotopy groups of the unitary groups and the Grassmann spaces of certain C*algebras.
Shuang Zhang*, University of Cincinnati
(87246107)

Saturday March 14, 1992, 2:10 p.m.5:00 p.m.
Special Session on Geometric Topology, IV
Birmingham, Bryant Conference Center

2:10 p.m.
Universal compacta for dimension theories.
Leonard R. Rubin*, University of Oklahoma
(8725438)

2:40 p.m.
Augmented group systems and nknots.
Daniel S. Silver*, University of South Alabama
(8725770)

3:10 p.m.
Celllike images and UV^m groups.
Gerard A. Venema*, Calvin College
(8725715)

3:40 p.m.
Some extension properties of homeomorphism groups of compact surfaces.
James E. West*, Cornell University
(87257128)

4:10 p.m.
Locally flat surfaces in the complex projective plane.
Ronnie Lee, Yale University
Dariusz M. Wilczynski*, University of Notre Dame
(87257127)

4:40 p.m.
Supersignature and the unknotting number.
J\"ozef H. Przytycki*, University of California, Riverside
Pawel Traczyk, University of Warszawski, Poland
(87257135)

Saturday March 14, 1992, 2:10 p.m.5:00 p.m.
Special Session on Harmonic Analysis and Related Topics, III
Mason, Bryant Conference Center

2:10 p.m.
Weighted norm inequalities for singular integral operators.
Carlos Perez*, University of Kentucky
(8724233)

2:40 p.m.
Size estimates for eigenvectors of singular integral operators.
Richard Rochberg*, Washington University
(8724799)

3:10 p.m.
Nonconvolution transforms with oscillating kernels that map B_1^0,1 into itself.
Gary Sampson*, Auburn University, Auburn
(8724205)

3:40 p.m.
Ellipticcaloric measures.
Caroline Sweezy*, New Mexico State University
(87235102)

4:10 p.m.
Eigenvalue estimates for degenerate fourthorder operators.
J. Michael Wilson*, University of Vermont
(8724235)

4:40 p.m.
Cyclic cocycles on some nilpotent analytic group and trace formula for some perturbation of partial differential operator.
Daoxing Xia*, Vanderbilt University
(8724731)

Saturday March 14, 1992, 2:10 p.m.4:30 p.m.
Special Session on Approximation Theory: Modern Methods, III
Logan, Bryant Conference Center

2:10 p.m.
Hermite interpolation on the lattice Z^d.
K. Jetter, University of Duisburg, Germany
Sherman D. Riemenschneider, University of Alberta
Z. Shen*, University of Wisconsin, Madison
(87241101)

2:40 p.m.
Uniform approximation by continuous isotone functions in a normed vector lattice.
Vasant A. Ubhaya*, North Dakota State University
(8724164)

3:10 p.m.
Variable knot splines and numerical quadratures for singular integrals.
Yuesheng Xu*, North Dakota State University
(8726565)

3:40 p.m.
Best uniform approximation by harmonic functions on subsets of Riemann surfaces.
D. Zwick*, University of Vermont
P. M. Gauthier, University of Montreal
(8724156)

4:10 p.m.
Quasiconformality and quasiregularity of Wachspress type rational complex planar splines of higher degree.
H. P. Dikshit, R. D. University, India
A. Ojha, R. D. University, India
R. A. Zalik*, Auburn University, Auburn
(8724184)
Inquiries: meet@ams.org