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AMS Sectional Meeting Full Program

Current as of Tuesday, April 12, 2005 15:08:34

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1989 Central Section Meeting
Chicago, IL, May 19-20, 1989
Meeting #849

Associate secretaries:
Andy R Magid, AMS amagid@ou.edu

Friday May 19, 1989

  • Friday May 19, 1989, 6:30 a.m.-9:50 a.m.
    Special Session on Sequence Spaces and Summability, I
    Room 339, Damen Hall

    • 6:30 a.m.
      BH envelopes and BH completions of NH spaces.
      Jeff Connor*, Ohio University, Athens
      W. E. Kaufman, Ohio University, Athens
      (849-46-75)
    • 7:00 a.m.
      The role of the sequence space phi in the theory of barrelled spaces.
      P. P. Narayanaswami*, Memorial University of Newfoundland
      (849-46-165)
    • 7:30 a.m.
      Some properties of absolute summability domains.
      M. S. Macphail*, Carleton University
      C. Orhan, University of Ankara, Turkey
      (849-40-18)
    • 8:00 a.m.
      Sequences of regular summability methods.
      Casper Goffman*, Purdue University, West Lafayette
      (849-40-02)
    • 8:30 a.m.
      FK-products, E superior beta beta and uniformly convergent Fourier series.
      G\"unther W. Goes*, University of Stuttgart, Federal Republic of Germany
      (849-40-104)
    • 9:00 a.m.
      A question concerning self-dual Hilbert K-spaces.
      A. K. Snyder*, Lehigh University
      (849-40-37)
    • 9:30 a.m.
      Absolute Norlund matrix summability of Fourier series based on inclusion theorems.
      Brian Kuttner, University of Birmingham, England
      Billy E. Rhoades*, Indiana University
      (849-40-129)

  • Friday May 19, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Geometric Topology, I
    Room 641, Damen Hall

    • 7:00 a.m.
      Eta invariants of hyperbolic 3-manifolds.
      Walter D. Neumann*, Ohio State University, Columbus
      Robert Meyerhoff, Boston University
      (849-57-21)
    • 7:30 a.m.
      Some new 4-manifolds.
      Selman Akbulut*, Michigan State University
      (849-57-234)
    • 8:00 a.m.
      Some simple fake 4-manifolds.
      Robert E. Gompf*, University of Texas, Austin
      (849-57-81)
    • 8:30 a.m.
      Representation spaces of Seifert fibered homology spheres.
      Paul Kirk*, California Institute of Technology
      Eric Klassen, California Institute of Technology
      (849-57-72)
    • 9:00 a.m.
      Instanton polynomials for homology three spheres.
      Ronald J. Stern*, University of Utah
      Ronald Fintushel, Michigan State University
      (849-57-127)
    • 9:30 a.m.
      Realization of group actions on 4-manifolds.
      Allan L. Edmonds*, Indiana University, Bloomington
      John H. Ewing, Indiana University, Bloomington
      (849-57-99)

  • Friday May 19, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Quadratic Forms and Real Algebraic Geometry, I
    Room 342, Damen Hall

    • 7:00 a.m.
      Sums of squares in Witt rings.
      D. W. Lewis*, University College of Dublin, Republic of Ireland
      (849-11-168)
    • 7:30 a.m.
      Witt kernels of algebraic extensions.
      David B. Leep*, University of Kentucky
      (849-12-142)
    • 8:00 a.m.
      On the structure of the Clifford algebra over a commutative ring.
      Alexander J. Hahn*, University of Notre Dame
      (849-15-13)
    • 8:30 a.m.
      Galois groups over C-fields.
      Tara L. Smith*, Ohio State University, Columbus
      J\'an Min\'a\v c, University of Western Ontario
      (849-12-32)
    • 9:00 a.m.
      Informal Discussion
    • 9:30 a.m.
      Picard groups of Witt rings.
      Robert W. Fitzgerald*, Southern Illinois University, Carbondale
      (849-11-110)

  • Friday May 19, 1989, 7:30 a.m.-9:50 a.m.
    Special Session on Codes and Designs, I
    Room 149, Damen Hall

    • 7:30 a.m.
      On smallest Latin square graphs with given automorphism group.
      William C. Arlinghaus*, Lawrence Institute of Technology
      (849-05-57)
    • 8:00 a.m.
      Isomorphisms of objects over a finite field.
      Hong Goo Park*, University of North Texas
      (849-05-132)
    • 8:30 a.m.
      Partition lattices and experimental design.
      Jay H. Beder*, University of Wisconsin, Milwaukee
      (849-06-89)
    • 9:00 a.m.
      Designs admitting affine linear maps as automorphisms.
      Neal Brand*, University of North Texas
      Somporn Sutinuntopas, Ramkamhaeng University, Thailand
      (849-05-158)
    • 9:30 a.m.
      Character tables of commutative association schemes and the study of their subschemes.
      Eiichi Bannai*, Ohio State University, Columbus
      (849-05-252)

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Noncommutative Ring Theory, I
    Room 730, Damen Hall

    • 8:00 a.m.
      Inner gradings and Galois extensions with normal basis.
      Margaret Beattie*, Mount Allison University
      (849-16-50)
    • 8:30 a.m.
      Some 3-dimensional skew polynomial rings.
      Allen D. Bell*, University of Wisconsin, Milwaukee
      S. Paul Smith, University of Washington
      (849-16-125)
    • 9:00 a.m.
      Verbally prime P.I. algebras.
      Allan Berele*, DePaul University
      (849-16-123)
    • 9:30 a.m.
      Delta methods in enveloping rings.
      Jeffrey M. Bergen*, DePaul University
      D. S. Passman, University of Wisconsin, Madison
      (849-16-124)

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Numerical Methods in Harmonic Analysis, I
    Room 238, Damen Hall

    • 8:00 a.m.
      Fast wavelet transforms in numerical analysis and potential theory. I.
      G. Beylkin*, Yale University
      R. Coifman, Yale University
      V. Rokhlin, Yale University
      (849-65-196)
    • 8:30 a.m.
      Informal Discussion
    • 9:30 a.m.
      Fast wavelet transforms in numerical analysis and potential theory. II.
      G. Beylkin, Yale University
      R. Coifman*, Yale University
      V. Rokhlin, Yale University
      (849-65-197)

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Kazhdan-Lusztig Theory and Related Topics, I
    Room 441, Damen Hall

    • 8:00 a.m.
      The proof of the Kazhdan-Lusztig conjecture revisited.
      Leonard Scott*, University of Virginia
      S. Roan, Clark University
      (849-20-180)
    • 8:30 a.m.
      An approach to the Kazhdan-Lusztig conjecture for Kac-Moody algebras.
      Luis Casian*, Ohio State University, Columbus
      (849-22-146)
    • 9:00 a.m.
      Multiplicity free categories of highest weight representations. I.
      Brian D. Boe*, University of Georgia
      David H. Collingwood, University of Washington
      (849-17-215)
    • 9:30 a.m.
      Systems of differential operators and unitary highest weight modules.
      Thomas J. Enright*, University of California at San Diego, La Jolla
      (849-17-150)

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Algebraic Groups and Related Topics, I
    Room 440, Damen Hall

    • 8:00 a.m.
      Reflection representations of Hecke algebras of certain Weyl groups.
      Hemant Kumar Tiwari*, University of Chicago
      (849-20-209)
    • 8:30 a.m.
      Algebraic properties of Kloosterman sums for Chevalley groups.
      Romuald Dabrowski*, Indiana University, Bloomington
      (849-20-92)
    • 9:00 a.m.
      A geometric presentation of the lambda sub 2 module of C sub n (q).
      Steve M. Cohen*, University of Illinois, Chicago
      (849-20-254)
    • 9:30 a.m.
      Rings of invariants for maximal unipotent subgroups.
      Frank D. Grosshans*, West Chester University of Pennsylvania
      (849-20-38)

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Arithmetic Geometry and Intersection Theory, I
    Room 530, Damen Hall

    • 8:00 a.m.
      The arithmetic Riemann-Roch theorem.
      Christophe Soul\'e*, Institut des Hautes \'Etudes Scientifiques, and Centre National de la Recherche Scientifique, France
      (849-11-66)
    • 8:30 a.m.
      Discussion
    • 9:00 a.m.
      Green's functions on non-archimedean Riemann surfaces.
      Ernst Kani*, Queen's University
      (849-11-255)
    • 9:30 a.m.
      Discussion

  • Friday May 19, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Recursion Theory, I
    Room 529, Damen Hall

    • 8:00 a.m.
      Separating jump classes in the r.e. degrees I: Working below a low sub 2 r.e. degree.
      Richard A. Shore*, Cornell University
      Theodore A. Slaman, University of Illinois, Chicago
      (849-03-88)
    • 8:30 a.m.
      Working below a high recursively enumerable degree.
      Richard A. Shore, Cornell University
      Theodore A. Slaman*, University of Chicago
      (849-03-108)
    • 9:00 a.m.
      Some results on the structure of the Sigma sub 2 enumeration degrees.
      Seema Ahmad*, Simon Fraser University
      (849-03-97)
    • 9:30 a.m.
      Homogeneous countable models of tame theories.
      Terrence Millar*, University of Wisconsin, Madison
      (849-03-85)

  • Friday May 19, 1989, 8:00 a.m.-9:00 a.m.
    Special Session on Partial Differential Equations, I
    Room 239, Damen Hall

    • 8:00 a.m.
      Isolated singularities of p-harmonic functions on the plane.
      E. Dibenedetto, Northwestern University
      J. Manfredi*, Northwestern University
      (849-35-35)
    • 8:40 a.m.
      On certain partial differential operators of odd finite type.
      Alexandrou A. Himonas*, Princeton University
      (849-35-43)

  • Friday May 19, 1989, 8:00 a.m.-9:55 a.m.
    Session on General Session
    Room 148, Damen Hall

    • 8:00 a.m.
      Representation of invariant nonstandard hulls in internal set theory.
      Nader Vakil*, Western Illinois University
      (849-03-190)
    • 8:15 a.m.
      Topological compactness and the axiom of choice. II.
      Paul E. Howard*, Eastern Michigan University
      (849-03-210)
    • 8:30 a.m.
      Free sets for nowhere dense set maps on the generalized linear continua.
      Kandasamy Muthuvel*, University of Wisconsin, Oshkosh
      (849-04-70)
    • 8:45 a.m.
      On C infinity-words.
      W. D. Weakley*, Indiana University-Purdue University, Ft.\ Wayne
      (849-05-16)
    • 9:00 a.m.
      Fibonacci numbers and Pythagorean triangles of equal areas.
      Malvina Baica*, University of Wisconsin, Whitewater
      (849-11-20)
    • 9:15 a.m.
      Base change for PSL(2).
      David Joyner*, United States Naval Academy
      (849-11-269)
    • 9:30 a.m.
      Integral domains whose set of prime ideals is coprimely packed.
      Vahap Erdogdu*, Middle East Technical University, Ankara, Turkey
      (849-13-258)
    • 9:45 a.m.
      Dimensions of modules.
      John Dauns*, Tulane University
      (849-99-272)

  • Friday May 19, 1989, 10:00 a.m.-10:50 a.m.
    Invited Address

  • Friday May 19, 1989, 12:30 p.m.-1:20 p.m.
    Invited Address
    Analogies between function fields and number fields.
    Auditorium, Flanner Hall
    Henri Gillet*, University of Illinois, Chicago
    (849-14-181)

  • Friday May 19, 1989, 1:30 p.m.-5:20 p.m.
    Special Session on Sequence Spaces and Summability, II
    Room 339, Damen Hall

    • 1:30 p.m.
      Sequence transformations that guarantee a given rate of convergence.
      G. H. Fricke, Wright State University, Dayton
      J. A. Fridy*, Kent State University, Kent
      (849-40-56)
    • 2:00 p.m.
      Coin tossing and moment sequences.
      Grahame Bennett*, Indiana University, Bloomington
      (849-40-10)
    • 2:30 p.m.
      Asymptotic relationships between Dirichlet series.
      David Borwein*, University of Western Ontario
      (849-40-84)
    • 3:00 p.m.
      Some distinguished subsets of FK-spaces containing phi.
      Wolfgang Beekmann, Fern Universitat Hagen, Federal Republic of Germany
      Shao-Chien Chang*, Brock University
      (849-40-106)
    • 3:30 p.m.
      The gliding humps property of the factor sequences and the weakly sequential completeness of the beta-dual of a sequence space.
      Johann Boos*, Fern Universitat, Hagen, Federal Republic of Germany
      (849-46-175)
    • 4:00 p.m.
      Bounded consistency on strong summability fields.
      C. S. Chun, Simon Fraser University
      Allen R. Freedman*, Simon Fraser University
      (849-40-202)
    • 4:30 p.m.
      Full families and sequential completeness.
      John J. Sember*, Simon Fraser University
      (849-40-141)
    • 5:00 p.m.
      Sequence spaces and summability.
      George U. Brauer*, University of Minnesota, Minneapolis
      (849-40-07)

  • Friday May 19, 1989, 2:00 p.m.-5:20 p.m.
    Special Session on Noncommutative Ring Theory, II
    Room 730, Damen Hall

    • 2:00 p.m.
      Rings all of whose Pierce stalks are weakly local.
      Douglas G. Burkholder*, Wichita State University
      (849-16-242)
    • 2:30 p.m.
      Semiprime crossed products.
      William Chin*, DePaul University
      (849-16-118)
    • 3:00 p.m.
      When is the Clifford algebra of a binary cubic form split?
      Darrell Haile*, Indiana University, Bloomington
      (849-16-120)
    • 3:30 p.m.
      Quantum Kleinian singularities.
      Timothy J. Hodges*, University of Cincinnati
      (849-16-121)
    • 4:00 p.m.
      A characterization of uniserial rings via continuous modules.
      S. K. Jain*, Ohio University, Athens
      S. R. Lopez-Permouth, Ohio University, Athens
      S. Tariq Rizvi, Ohio State University, Lima
      (849-16-69)
    • 4:30 p.m.
      Informal Discussion
    • 5:00 p.m.
      Splitters and relative homological algebra.
      Mark Kleiner*, Syracuse University
      Aboubakr Lbekkouri, Universite de Mohammed V, Morocco
      (849-16-49)

  • Friday May 19, 1989, 2:00 p.m.-5:20 p.m.
    Special Session on Geometric Topology, II
    Room 641, Damen Hall

    • 2:00 p.m.
      Cutting and pasting and the eta invariant.
      Daniel Ruberman*, Brandeis University
      Robert Meyerhoff, Boston University
      (849-57-67)
    • 2:30 p.m.
      On Milnor's invariants and the concordance classification of links.
      Nathan Habegger*, University of Georgia
      Xiao-Song Lin, Columbia University
      (849-57-247)
    • 3:00 p.m.
      Homology boundary links, Andrews-Curtis conjecture and the Hawaiian earrings space.
      Tim D. Cochran*, Northwestern University
      (849-57-237)
    • 3:30 p.m.
      Cochran's link invariants and Massey products.
      Kent Orr*, University of Chicago
      (849-57-240)
    • 4:00 p.m.
      Surgery invariants of link cobordism.
      Lawrence J. Smolinsky*, Louisiana State University, Baton Rouge
      (849-57-100)
    • 4:30 p.m.
      Studying links via closed braids. II.
      William W. Menasco*, State University of New York, Buffalo
      Joan S. Birman, Columbia University
      (849-57-236)
    • 5:00 p.m.
      Spherical space forms and Dehn surgery.
      Steven A. Bleiler*, Portland State University
      (849-57-235)

  • Friday May 19, 1989, 2:00 p.m.-3:50 p.m.
    Special Session on Numerical Methods in Harmonic Analysis, II
    Room 238, Damen Hall

    • 2:00 p.m.
      The phi-transform and applications to computer graphics.
      Anca Deliu, University of Georgia
      Bj\"orn Jawerth*, University of South Carolina, Columbia
      (849-42-212)
    • 2:30 p.m.
      Local extrema of a wavelet transform.
      Stephane Mallat*, Courant Institute of Mathematical Sciences, New York University
      (849-42-195)
    • 3:00 p.m.
      Atomic decompositions and non-linear approximation.
      Ronald A. DeVore*, University of South Carolina, Columbia
      Bj\"orn Jawerth, University of South Carolina, Columbia
      Vasil Popov, Bulgarian Academy of Science, Sofia, Bulgaria
      (849-65-107)
    • 3:30 p.m.
      Generalized sampling and Triebel-Lizorkin spaces.
      Bj\"orn Jawerth, University of South Carolina, Columbia
      Grant V. Welland*, University of Missouri, St.\ Louis
      (849-42-220)

  • Friday May 19, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Kazhdan-Lusztig Theory and Related Topics, II
    Room 441, Damen Hall

    • 2:00 p.m.
      Geometry and combinatorics of Schubert varieties.
      V. Lakshmibai*, Northwestern University
      (849-14-153)
    • 2:30 p.m.
      A connection of equivariant K-theory with the singularity of Schubert varieties.
      Shrawan Kumar*, Institute for Advanced Study and Tata Institute of Fundamental Research, Bombay, India
      (849-20-152)
    • 3:00 p.m.
      Loop groups, the Schubert calculus and the principal nilpotent.
      Dale H. Peterson*, University of British Columbia
      (849-22-157)
    • 3:30 p.m.
      Frobenius action on the B-cohomology.
      Olivier Mathieu*, Universit\'e de Paris 7, France
      (849-20-154)
    • 4:00 p.m.
      Schubert varieties in Hermitian symmetric spaces.
      Erhard Neher*, University of Ottawa
      (849-20-155)
    • 4:30 p.m.
      Hyperalgebras, highest weight categories and finite dimensional algebras.
      Brian Parshall*, University of Virginia
      (849-20-156)

  • Friday May 19, 1989, 2:00 p.m.-4:20 p.m.
    Special Session on Algebraic groups and related topics, II
    Room 440, Damen Hall

    • 2:00 p.m.
      On the structure of parabolic subgroups.
      Hassan Azad, Quaid-i-Azam University, Islamabad, Pakistan
      Michael Barry*, Allegheny College
      Gary Seitz, University of Oregon
      (849-20-53)
    • 2:30 p.m.
      Decomposition numbers of SP(4,q) for primes dividing q+1.
      Donald L. White*, University of Illinois, Chicago
      (849-20-52)
    • 3:00 p.m.
      Some connections between M-G- and S-representions.
      Leonid Krop*, DePaul University
      (849-20-05)
    • 3:30 p.m.
      Invariant theory of regular subgroups.
      Lin Tan*, Indiana University, Bloomington
      (849-20-248)
    • 4:00 p.m.
      On the symmetric powers of the natural representation of groups of classical types.
      Jyrki Lahtonen*, University of Notre Dame
      (849-22-178)

  • Friday May 19, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Arithmetic Geometry and Intersection Theory, II
    Room 530, Damen Hall

    • 2:00 p.m.
      Algebraic points on curves of genus greater than one.
      Paul Vojta*, University of California, Berkeley
      (849-11-259)
    • 2:30 p.m.
      Discussion
    • 3:00 p.m.
      Faltings's metrics on cohomology.
      William G. McCallum*, University of Arizona
      (849-14-230)
    • 3:30 p.m.
      Discussion
    • 4:00 p.m.
      Potential theory on arithmetic curves.
      David Harbater*, University of Pennsylvania
      (849-14-65)
    • 4:30 p.m.
      Discussion

  • Friday May 19, 1989, 2:00 p.m.-3:50 p.m.
    Special Session on Recursion Theory, II
    Room 529, Damen Hall

    • 2:00 p.m.
      Universes for 3-E.
      Gerald E. Sacks*, Harvard University and Massachusets Institute of Technology
      (849-03-109)
    • 2:30 p.m.
      The structure of degrees uniform under different equivalence relations.
      Hong Ye*, University of California, Santa Barbara
      (849-03-47)
    • 3:00 p.m.
      Priority arguments and Sigma sub 2-induction.
      Marcia J. Groszek*, Dartmouth College
      (849-03-171)
    • 3:30 p.m.
      Polytime mathematics and logic.
      Anil Nerode*, Cornell University
      (849-03-94)

  • Friday May 19, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Codes and Designs, II
    Room 149, Damen Hall

    • 2:00 p.m.
      On the problem of constructing binary constant weight codes.
      N. J. A. Sloane*, AT&T Bell Laboratories, Murray Hill, New Jersey
      (849-94-229)
    • 2:30 p.m.
      Designs characterized by codes.
      J. D. Key*, Clemson University
      (849-51-161)
    • 3:00 p.m.
      Affine planes from codes.
      E. F. Assmus, Jr.*, Lehigh University
      (849-51-162)
    • 3:30 p.m.
      Decompositions of designs and codes.
      K. T. Phelps*, Auburn University, Auburn
      (849-05-193)
    • 4:00 p.m.
      Code automorphism group algorithms.
      Jeffrey S. Leon*, University of Illinois, Chicago
      (849-05-262)
    • 4:30 p.m.
      A coalgebra structure for a class of two-dimensional cyclic product codes.
      Jerry Goldman*, DePaul University
      (849-94-25)

  • Friday May 19, 1989, 2:00 p.m.-4:20 p.m.
    Special Session on Algebraic Topology of Varieties, I
    Room 531, Damen Hall

    • 2:00 p.m.
      Topological types of isolated two-dimensional hypersurface singularities and Zariski multiplicity problem.
      Stephen S-T. Yau*, University of Illinois, Chicago
      (849-55-95)
    • 2:30 p.m.
      Applications of mixed Hodge theory to the topology of complex varieties.
      Alan H. Durfee*, Mount Holyoke College
      (849-14-93)
    • 3:00 p.m.
      Casson invariant of links of surface singularities.
      Walter D. Neumann*, Ohio State University, Columbus
      Jonathan Wahl, University of North Carolina, Chapel Hill
      (849-57-23)
    • 3:30 p.m.
      Complex structure on K\"ahler manifolds.
      Anatoly S. Libgober, University of Illinois, Chicago
      John W. Wood*, University of Illinois, Chicago
      (849-57-87)
    • 4:00 p.m.
      The Riccati flow and singularities of Schubert varieties.
      James S. Wolper*, Hamilton College
      (849-14-68)

  • Friday May 19, 1989, 2:00 p.m.-4:20 p.m.
    Special Session on Partial Differential Equations, II
    Room 239, Damen Hall

    • 2:00 p.m.
      Singular solutions of the equation - Delta u = lambda e superior u.
      Hamid Bellout*, Northern Illinois University
      (849-35-45)
    • 2:40 p.m.
      Uniqueness in the Cauchy problem and weakly pseudo-convex initial surfaces.
      Xavier Saint-Raymond*, Purdue University, West Lafayette
      (849-35-111)
    • 3:20 p.m.
      A global attractor for a reaction-diffusion system arising from climate modeling.
      Georg Hetzer*, Auburn University, Auburn
      Paul Guenter Schmidt, Auburn University, Auburn
      (849-35-60)
    • 4:00 p.m.
      A parametrix for the overline partial-Neumann problem.
      Kyoko Kimura*, University of South Carolina, Columbia
      (849-35-42)

  • Friday May 19, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Quadratic Forms and Real Algebraic Geometry, II
    Room 342, Damen Hall

    • 2:00 p.m.
      A sup-inf-polynomially varying solution to Hilbert's $17$th problem.
      Charles N. Delzell*, Louisiana State University, Baton Rouge
      (849-14-160)
    • 2:30 p.m.
      Places on *-fields and the real holomorphy ring.
      Thomas C. Craven*, University of Hawaii, Honolulu
      (849-12-26)
    • 3:00 p.m.
      Orders and order closures for not necessarily formally real fields.
      Ron Brown*, University of Hawaii, Honolulu
      (849-12-113)
    • 3:30 p.m.
      Witt rings and spaces of orderings of projective planes.
      Franz Kalhoff*, University of Dortmund, Federal Republic of Germany
      (849-11-203)
    • 4:00 p.m.
      Signatures of higher level on rings with many units.
      M. Marshall, University of Saskatchewan
      L. Walter*, University of Saskatchewan
      (849-13-19)
    • 4:30 p.m.
      Higher level orders on noncommutative rings.
      Victoria A. Powers*, Emory University
      (849-06-177)

  • Friday May 19, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Nonlinear Analysis and its Applications, I
    Room 340, Damen Hall

    • 2:00 p.m.
      A common fixed point theorem in metric spaces with normal structure.
      M. A. Khamsi*, University of Rhode Island
      (849-46-243)
    • 2:30 p.m.
      Eigenvectors and fixed points for superlinear maps.
      Mario Martelli*, California State University, Fullerton
      (849-46-105)
    • 3:00 p.m.
      Degree theory for some semilinear equations and applications to wave equations.
      Juha Berkovits, University of Oulu, Finland
      Vesa Mustonen*, University of Oulu, Finland
      (849-35-98)
    • 3:30 p.m.
      Bivariational and singular variational derivatives.
      M. Zuhair Nashed*, University of Delaware
      (849-49-227)
    • 4:00 p.m.
      Generalized Brouwer-Kakutani type fixed point theorems.
      Sehie Park*, Seoul National University, Korea and MSRI, Korea,
      (849-46-33)
    • 4:30 p.m.
      Some generalizations of the Meir-Keeler type contraction maps.
      Billy E. Rhoades*, Indiana University, Bloomington
      Sehie Park, Seoul National University, Korea
      Kwon Bae Moon, San Myung Women's University, Korea
      (849-47-55)

  • Friday May 19, 1989, 2:00 p.m.-4:40 p.m.
    Session on General Session
    Room 148, Damen Hall

    • 2:00 p.m.
      Fake generic splitting fields.
      James K. Deveney*, Virginia Commonwealth University
      Joe Yanik, Virginia Commonwealth University
      (849-12-103)
    • 2:15 p.m.
      Zero cycles and generalized Albanese varieties.
      Hur\c sit \"Onsiper*, Middle East Technical University, Ankara, Turkey
      (849-14-187)
    • 2:30 p.m.
      On glueing affine varieties.
      Khomo T. S. Mohapeloa*, Pennsylvania State University, McKeesport
      (849-14-219)
    • 2:45 p.m.
      The spherical spectrum of a graded ring.
      Hasan Yousef*, Lehigh University
      Gilbert Stengle, Lehigh University
      (849-14-221)
    • 3:00 p.m.
      A characterization of spaces of closest fit.
      Seymour Kass*, University of Massachusetts, Boston
      (849-15-226)
    • 3:15 p.m.
      Correspondence theorems for endomorphism rings of modules.
      Khuri Soumaya*, East Carolina University
      (849-16-96)
    • 3:30 p.m.
      Some properties of higher order derivatives.
      P. S. Bullen*, University of British Columbia
      S. N. Mukhopadhyay, Burdwan University, West Bengal, India
      (849-26-211)
    • 3:45 p.m.
      On an extension of the Lebesgue measure.
      Jerzy Filus*, Illinois Institute of Technology
      (849-28-182)
    • 4:00 p.m.
      Constructing a pair of pants.
      Ara Basmajian*, University of Oklahoma
      (849-30-138)
    • 4:15 p.m.
      A Picard theorem for projective varieties.
      Peter Hall*, Washington University
      (849-32-30)
    • 4:30 p.m.
      A two point connection problem for a certain ordinary linear homogeneous differential equation.
      T. K. Puttaswamy*, Ball State University
      (849-34-12)

Saturday May 20, 1989

  • Saturday May 20, 1989, 6:30 a.m.-9:50 a.m.
    Special Session on Sequence Spaces and Summability, III
    Room 339, Damen Hall

    • 6:30 a.m.
      Types P and P superior * sequence spaces.
      Lee Baric*, Dickinson College
      (849-40-58)
    • 7:00 a.m.
      Positive matrix operators between Koethe sequence spaces.
      William H. Ruckle*, Clemson University
      (849-40-04)
    • 7:30 a.m.
      The beta-dual of FK-spaces. II.
      J. C. Magee*, State University of New York, College at Potsdam
      (849-40-184)
    • 8:00 a.m.
      Matrix methods of Bohr-Hardy type.
      J. V. DeFranza*, St Lawrence University
      (849-40-185)
    • 8:30 a.m.
      Summability factors on a class of methods of Bohr-Hardy type.
      D. J. Fleming*, St Lawrence University
      A. Peyerimhoff, Universit\"at Ulm, Federal Republic of Germany
      (849-40-183)
    • 9:00 a.m.
      Limited sets and c sub 0 and some other stuff.
      Joseph Diestel*, Kent State University, Kent
      (849-46-01)
    • 9:30 a.m.
      Toeplitz bases in matrix fields.
      Amnon Jakimovski*, Tel-Aviv University, Israel
      (849-40-253)

  • Saturday May 20, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Noncommutative Ring Theory, III
    Room 730, Damen Hall

    • 7:00 a.m.
      Minimal differential identities in prime rings with involution.
      Charles Lanski*, University of Southern California
      (849-16-122)
    • 7:30 a.m.
      Rings of differential operators over rational affine curves.
      Gail Letzter*, Wayne State University
      Leonid Makar-Limanov, Wayne State University
      (849-16-205)
    • 8:00 a.m.
      Roiter's and Drozd's theorems in dimension 1.
      Robert M. Guralnick*, University of Southern California
      Lawrence S. Levy, University of Wisconsin, Madison
      (849-16-144)
    • 8:30 a.m.
      Trace functions in the rings of fractions of polycyclic group rings.
      A. I. Lichtman*, University of Wisconsin, Parkside
      (849-16-208)
    • 9:00 a.m.
      On the global dimension of fixed rings.
      Martin Lorenz*, Northern Illinois University
      (849-16-119)
    • 9:30 a.m.
      Automorphism groups of the universal enveloping algebras of general-position finite dimensional Lie algebras.
      Leonard G. Makar-Limanov*, Wayne State University
      (849-16-206)

  • Saturday May 20, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Geometric Topology, III
    Room 641, Damen Hall

    • 7:00 a.m.
      Studying links via closed braids. I.
      Joan S. Birman*, Columbia University
      William W. Menasco, State University of New York, College at Buffalo
      (849-57-231)
    • 7:30 a.m.
      Cutting and pasting and the Chern-Simons invariant.
      Robert Meyerhoff*, Boston University
      Daniel Ruberman, Brandeis University
      (849-53-82)
    • 8:00 a.m.
      On links as obstructions to free reduction.
      R. Craggs*, University of Illinois, Urbana-Champaign
      (849-57-80)
    • 8:30 a.m.
      Masses of moduli spaces of punctured surfaces.
      R. C. Penner*, University of Southern California
      (849-51-91)
    • 9:00 a.m.
      One fixed point actions on low-dimensional spheres.
      N. P. Buchdahl, Tulane University
      Slawomir Kwasik*, Tulane University
      Reinhard Schultz, Purdue University, West Lafayette
      (849-57-102)
    • 9:30 a.m.
      Pin structures on manifolds.
      Laurence R. Taylor*, University of Notre Dame
      (849-57-137)

  • Saturday May 20, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Codes and Designs, III
    Room 149, Damen Hall

    • 7:00 a.m.
      Informal Discisussion
    • 7:30 a.m.
      PG(2,4) and connected 2-regular graphs on six vertices.
      Chester J. Salwach*, Lafayette College
      (849-05-173)
    • 8:00 a.m.
      Support sizes of triple systems.
      Charles J. Colbourn*, University of Waterloo
      (849-05-15)
    • 8:30 a.m.
      Large sets of designs.
      Yeow Meng Chee*, University of Waterloo
      Charles J. Colbourn, University of Waterloo
      Donald L. Kreher, Rochester Institute of Technology
      (849-05-17)
    • 9:00 a.m.
      Halving Steiner triple systems.
      Alexander Rosa*, McMaster University
      (849-05-134)
    • 9:30 a.m.
      Some structures related to t-designs.
      Luc Teirlinck*, Auburn University
      (849-05-191)

  • Saturday May 20, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Quadratic Forms and Real Algebraic Geometry, III
    Room 342, Damen Hall

    • 7:00 a.m.
      The real spectrum of higher level of a commutative ring.
      Susan Barton*, Pennsylvania State University, Delaware County Campus
      (849-13-140)
    • 7:30 a.m.
      Nonarchimedean real analysis.
      Robby Robson*, Oregon State University
      (849-14-24)
    • 8:00 a.m.
      Nash groups.
      J. Madden*, Indiana University, South Bend
      C. Stanton, Indiana University, South Bend
      (849-22-143)
    • 8:30 a.m.
      Some new Vapnik-Chervonenkis classes.
      Gilbert Stengle*, Lehigh University
      Joseph Yukich, Lehigh University
      (849-14-27)
    • 9:00 a.m.
      Spinor norms of similarities.
      D. B. Shapiro*, Ohio State University, Columbus
      I. Alarcon, Ohio State University, Columbus
      (849-15-78)
    • 9:30 a.m.
      Round quadratic forms under algebraic extensions.
      Burkhard Alpers*, University of Saskatchewan
      (849-11-44)

  • Saturday May 20, 1989, 7:00 a.m.-9:50 a.m.
    Special Session on Nonlinear Analysis and its Applications, II
    Room 340, Damen Hall

    • 7:00 a.m.
      On Mosco convergence of convex functions.
      Gerald Beer*, California State University, Los Angeles
      (849-46-135)
    • 7:30 a.m.
      Relative index theories, linking and the minmax method.
      Edward Fadell*, University of Wisconsin, Madison
      (849-58-217)
    • 8:00 a.m.
      The relative category and its applications to differential equations.
      Gilles Fournier*, Universit\'e de Sherbrooke
      Michel Willem, Universit\'e Catholique Louvain, Belgium
      (849-58-256)
    • 8:30 a.m.
      Positive fixed points and bifurcation for quasibounded maps.
      E. De Pascale, University of Calabria, Italy
      R. Guzzardi*, University of Calabria, Italy
      (849-47-244)
    • 9:00 a.m.
      Nonlinear analysis in hyperbolic spaces.
      Simeon Reich*, University of Southern California and The Technion, Haifa, Israel
      (849-47-216)
    • 9:30 a.m.
      Sharp properties of a regularization method for inversion of Fourier series.
      Leonede De Michele, University of Milan, Italy
      Marina Di Natale, University of Milan, Italy
      Delfina Roux*, University of Milan, Italy
      (849-42-273)

  • Saturday May 20, 1989, 7:00 a.m.-9:10 a.m.
    Session on General Session
    Room 148, Damen Hall

    • 7:00 a.m.
      L superior infinty-bounds for a quasilinear reaction-diffusion system arising from climate modeling.
      Georg Hetzer, Auburn University, Auburn
      Paul Guenter Schmidt*, Auburn University, Auburn
      (849-35-188)
    • 7:15 a.m.
      Strictly equicontinuous subsets of the space of Bochner integrable functions.
      Mark Gruenwald*, Northern Illinois University
      (849-46-189)
    • 7:30 a.m.
      The topological degree for locally strongly phi-accretors operators.
      Yi-Chun Zhao*, Appalachian State University and Northeast Normal University, People's Republic of China
      Tao Sun, Northeast Normal University, People's Republic of China
      (849-47-77)
    • 7:45 a.m.
      The group and some finite surgery manifold groups of the Whitehead link.
      F. D. Lonergan*, Webster, Massachusetts
      J. Hosack, University of the South Pacific, Fiji Islands
      (849-55-29)
    • 8:00 a.m.
      Moments of quadratic mappings.
      Joann S. Turisco*, United States Naval Academy
      (849-55-268)
    • 8:15 a.m.
      Elliptic integral inequalities.
      Mostafa Ghandehari*, Naval Postgraduate School
      David Logothetti, Santa Clara University
      (849-52-03)
    • 8:30 a.m.
      Fixed point minimization.
      Michael R. Kelly*, Tulane University
      (849-57-115)
    • 8:45 a.m.
      On a constrained variational problem and the space of horizontal path.
      Zhong Ge*, Mathematical Sciences Research Institute, Berkeley
      (849-58-170)
    • 9:00 a.m.
      Degenerate and Poisson convergence criteria for success runs.
      Anant Godbole*, Michigan Technological University
      (849-60-228)

  • Saturday May 20, 1989, 7:30 a.m.-9:50 a.m.
    Special Session on Algebraic groups and related topics, III
    Room 440, Damen Hall

    • 7:30 a.m.
      The research of the modular representations of algebraic groups in China.
      Xi-Hua Cao, East China Normal University, People's Republic of China
      Jian Pan Wang*, East China Normal University, People's Republic of China and University of Virginia
      (849-20-198)
    • 8:00 a.m.
      Nonstandard vanishing of sheaf cohomology for reductive groups.
      J. E. Humphreys*, University of Massachusetts, Amherst
      (849-20-90)
    • 8:30 a.m.
      On decomposition of modular homology representations for group geometries.
      Stephen D. Smith*, University of Illinois, Chicago
      (849-20-34)
    • 9:00 a.m.
      Induction, deformation, and specialization of Lie algebra representations.
      Eric M. Friedlander*, Northwestern University
      Brian J. Parshall, University of Virginia
      (849-17-213)
    • 9:30 a.m.
      Informal Discussion

  • Saturday May 20, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Numerical Methods in Harmonic Analysis, III
    Room 238, Damen Hall

    • 8:00 a.m.
      Layer potentials for elastostatics in curvilinear polygonal domains.
      Jeff E. Lewis*, University of Illinois, Chicago
      (849-35-194)
    • 8:30 a.m.
      The optimal number of terms of Fourier and Walsh series for applications in population biology, image processing, and data presentation.
      James E. Daly*, University of Colorado, Colorado Springs
      (849-42-172)
    • 9:00 a.m.
      Potential flow in channels.
      Leslie Greengard*, Yale University
      (849-31-159)
    • 9:30 a.m.
      Pattern recognition by Fourier series.
      Keith Phillips*, New Mexico State University, Las Cruces
      (849-42-199)

  • Saturday May 20, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Kazhdan-Lusztig Theory and Related Topics, III
    Room 441, Damen Hall

    • 8:00 a.m.
      A decomposition theorem for self-dual modules in the category 0.
      David Collingwood, University of Washington
      Ronald Irving*, University of Washington
      (849-22-151)
    • 8:30 a.m.
      On the image of the Jacquet functor.
      David H. Collingwood*, University of Washington
      (849-22-204)
    • 9:00 a.m.
      Almost rigid nilpotent orbits.
      David Vogan*, Massachusetts Institute of Technology
      (849-22-08)
    • 9:30 a.m.
      Bruhat cells in the nilcone and the intersection rings of Schubert varieties.
      James B. Carrell*, University of British Columbia
      (849-20-145)

  • Saturday May 20, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Arithmetic Geometry and Intersection Theory, III
    Room 530, Damen Hall

    • 8:00 a.m.
      Riemann-Roch formulas and capacity theory.
      Ted Chinburg*, Columbia University
      (849-14-174)
    • 8:30 a.m.
      Discussion
    • 9:00 a.m.
      Capacity theory and intersection theory.
      Robert Rumely*, University of Georgia
      (849-11-214)
    • 9:30 a.m.
      Discussion

  • Saturday May 20, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Recursion Theory, III
    Room 529, Damen Hall

    • 8:00 a.m.
      Diagonally nonrecursive functions and their generalizations.
      Antonin Kucera*, Cornell University and Charles University, Prague, Czechoslovakia
      (849-03-71)
    • 8:30 a.m.
      n-generic degrees in n-quantifier arithmetic.
      Masahiro Kumabe*, University of Chicago
      (849-03-116)
    • 9:00 a.m.
      Array nonrecursive sets. I.
      Rod Downey, Victoria University of Wellington, New Zealand
      Carl Jockusch, University of Illinois, Urbana-Champaign
      Michael Stob*, Massachusetts Institute of Technology
      (849-03-167)
    • 9:30 a.m.
      Array nonrecursive sets. II.
      Rod Downey, Victoria University of Wellington, New Zealand
      Carl Jockusch*, University of Illinois, Urbana-Champaign
      Michael Stob, Massachusetts Institute of Technology
      (849-03-169)

  • Saturday May 20, 1989, 8:00 a.m.-9:50 a.m.
    Special Session on Algebraic Topology of Varieties, II
    Room 531, Damen Hall

    • 8:00 a.m.
      A generalization of the braid group.
      Igor Dolgachev*, University of Michigan, Ann Arbor
      (849-55-128)
    • 8:30 a.m.
      Mapping class groups, function spaces and their cohomology.
      F. R. Cohen*, University of Kentucky
      (849-55-86)
    • 9:00 a.m.
      Homotopy invariants of nonorientable 4-manifolds.
      Myung Ho Kim*, University of Wisconsin, Parkside
      Sadayoshi Kojima, Tokyo Institute of Technology, Japan
      Frank Raymond, University of Michigan, Ann Arbor
      (849-57-163)
    • 9:30 a.m.
      Informal Discussion

  • Saturday May 20, 1989, 8:00 a.m.-9:00 a.m.
    Special Session on Partial Differential Equations, III
    Room 239, Damen Hall

    • 8:00 a.m.
      Remarks on the Szeg\"o kernel.
      Nicholas Hanges*, Herbert H. Lehman College, City University of New York
      (849-32-112)
    • 8:40 a.m.
      Long range scattering and the Stark effect.
      Denis A. W. White*, University of Toledo
      (849-35-79)

  • Saturday May 20, 1989, 10:00 a.m.-10:50 a.m.
    Invited Address
    Estimates for singular numbers of integral operators.
    Auditorium, Flanner Hall
    Richard H. Rochberg*, Washington University
    (849-46-225)

  • Saturday May 20, 1989, 12:30 p.m.-1:20 p.m.
    Invited Address
    Microlocal analysis and applications to tomographic problems.
    Auditorium, Flanner Hall
    Nicholas Lerner*, Purdue University, West Lafayette
    (849-35-130)

  • Saturday May 20, 1989, 2:00 p.m.-5:20 p.m.
    Special Session on Noncommutative Ring Theory, IV
    Room 730, Damen Hall

    • 2:00 p.m.
      Computational techniques in enveloping algebras and fields.
      Peter Malcolmson*, Wayne State University
      (849-16-207)
    • 2:30 p.m.
      The symmetric ring of quotients of the coproduct of rings.
      Wallace S. Martindale, 3rd*, University of Massachusetts, Amherst
      (849-16-117)
    • 3:00 p.m.
      Primitive factor rings of enveloping algebras of nilpotent Lie superalgebras.
      Allen D. Bell, University of Wisconsin, Milwaukee
      Ian M. Musson*, University of Wisconsin, Milwaukee
      (849-16-126)
    • 3:30 p.m.
      An unusual free module.
      John D. O'Neill*, University of Detroit
      (849-16-41)
    • 4:00 p.m.
      X-Inner automorphisms of enveloping rings.
      James Osterburg*, University of Cincinnati
      D. S. Passman, University of Wisconsin, Madison
      (849-16-06)
    • 4:30 p.m.
      A quantum deformation of the shape-algebra for $GL(n)$.
      Earl J. Taft*, Rutgers University, New Brunswick
      Jacob Towber, Yale University
      (849-16-36)
    • 5:00 p.m.
      Uniform modules over serial rings with Krull dimension.
      Mary H. Wright*, Southern Illinois University, Carbondale
      (849-16-31)

  • Saturday May 20, 1989, 2:00 p.m.-5:20 p.m.
    Special Session on Sequence Spaces and Summability, IV
    Room 339, Damen Hall

    • 2:00 p.m.
      Hardy's inequality for the discrete Hausdorff transformation.
      Constantine Georgakis*, DePaul University
      (849-40-176)
    • 2:30 p.m.
      Hardy's inequality for higher order derivatives.
      Hans P. Heinig*, McMaster University
      Alois Kufner, Mathematical Institute, Prague, Czechoslovakia
      (849-44-74)
    • 3:00 p.m.
      Summability methods associated with Carleman classes and the representation of quasianalytic functions.
      Jamil A. Siddiqi*, Universit\'e Laval
      (849-40-264)
    • 3:30 p.m.
      Banach algebra of sequences and orthogonal polynomials.
      William C. Connett, University of Missouri, St.\ Louis
      Alan L. Schwartz*, University of Missouri, St.\ Louis
      (849-40-238)
    • 4:00 p.m.
      Hilb type estimates for homomorphisms of l superior 1 algebras.
      William C. Connett*, University of Missouri, St.\ Louis
      Alan L. Schwartz, University of Missouri, St.\ Louis
      (849-40-239)
    • 4:30 p.m.
      ``Nice'' restriction of functions between certain sequence spaces.
      Jong P. Lee*, State University of New York, College at Old Westbury
      (849-40-241)
    • 5:00 p.m.
      On an analogue of Hardy's inequality.
      P. D. Johnson, Jr., Auburn University
      R. N. Mohapatra*, University of Central Florida
      (849-40-250)

  • Saturday May 20, 1989, 2:00 p.m.-5:50 p.m.
    Special Session on Geometric Topology, IV
    Room 641, Damen Hall

    • 2:00 p.m.
      Some homeomorphic, but not diffeomorphic homogeneous 7-manifolds with strictly positive sectional curvature.
      Matthias Kreck, Universit\"at Mainz, Federal Republic of Germany
      Stephan Stolz*, University of Notre Dame
      (849-57-201)
    • 2:30 p.m.
      Volumes of hyperbolic 3-manifolds.
      Peter B. Shalen*, University of Illinois, Chicago
      Marc Culler, University of Illinois, Chicago
      (849-57-232)
    • 3:00 p.m.
      Alexander polynomials of periodic knots.
      James F. Davis*, Indiana University, Bloomington
      Charles Livingston, Indiana University, Bloomington
      (849-57-101)
    • 3:30 p.m.
      Knots and links in 3-manifolds.
      Richard K. Skora*, State University of New York, Stony Brook
      (849-57-139)
    • 4:00 p.m.
      Skein modules of 3-manifolds.
      Jim Hoste*, Pomona College
      J\'ozef Przytycki, University of British Columbia and Warsaw University, Poland
      (849-57-218)
    • 4:30 p.m.
      Algebraic geometry and knot polynomials.
      D. Cooper, University of California, Santa Barbara
      D. D. Long*, University of California, Santa Barbara
      (849-57-48)
    • 5:00 p.m.
      Dehn surgery on knots.
      Cameron Gordon*, University of Texas, Austin
      John Luecke, University of Texas, Austin
      (849-57-200)
    • 5:30 p.m.
      On the reflexivity of Cappell-Shaneson 2-knots.
      Jonathan A. Hillman*, Macquarie University, Australia
      (849-57-233)

  • Saturday May 20, 1989, 2:00 p.m.-4:30 p.m.
    Special Session on Kazhdan-Lusztig Theory and Related Topics, IV
    Room 441, Damen Hall

    • 2:00 p.m.
      Hecke algebras and shellings of Bruhat intervals.
      Matthew J. Dyer*, Massachusetts Institute of Technology
      (849-20-149)
    • 2:30 p.m.
      Cells in the affine Weyl group of type tilda D sub4.
      Jie Du*, University of Virginia and East China Normal University, Shanghai, People's Republic of China
      (849-20-148)
    • 3:00 p.m.
      A combinatorial set-up for questions in Kazhdan-Lusztig theory.
      Vinay V. Deodhar*, Indiana University, Bloomington
      (849-17-147)
    • 3:30 p.m.
      Informal Discussion

  • Saturday May 20, 1989, 2:00 p.m.-3:50 p.m.
    Special Session on Algebraic groups and related topics, IV
    Room 440, Damen Hall

    • 2:00 p.m.
      Extending morphisms from finite to algebraic groups.
      Gary M. Seitz*, University of Oregon
      Donna Testerman, Institute for Advanced Study
      (849-20-54)
    • 2:30 p.m.
      Some remarks on Green functions of classical groups.
      Bhama Srinivasan*, University of Illinois, Chicago
      (849-20-222)
    • 3:00 p.m.
      Quantum GL sub n.
      Richard Dipper*, University of Oklahoma
      (849-20-179)
    • 3:30 p.m.
      Structure of cohomology of line bundles on G/B for semisimple groups.
      Zongzhu Lin*, University of Massachusetts, Amherst
      (849-20-51)

  • Saturday May 20, 1989, 2:00 p.m.-3:50 p.m.
    Special Session on Recursion Theory, IV
    Room 529, Damen Hall

    • 2:00 p.m.
      Constructions by transfinitely many workers.
      Julia F. Knight*, University of Notre Dame
      (849-03-166)
    • 2:30 p.m.
      The lattice of ideals of R.E. degrees.
      William C. Calhoun*, University of California, Berkeley
      (849-03-131)
    • 3:00 p.m.
      Minimal degrees and recursively inseparable sets.
      Manuel Lerman*, University of Connecticut, Storrs
      (849-03-59)
    • 3:30 p.m.
      Amenable equivalence relations and Turing degrees.
      Alexander S. Kechris*, California Institute of Technology
      (849-03-76)

  • Saturday May 20, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Codes and Designs, IV
    Room 149, Damen Hall

    • 2:00 p.m.
      Redundancy of Goppa codes.
      Jonathan I. Hall*, Michigan State University
      Albert M. Roseiro, Michigan State University
      (849-94-260)
    • 2:30 p.m.
      On minimum weight codewords in QR codes.
      Donald W. Newhart*, Department of Defense, Ft. Meade, Maryland
      (849-94-133)
    • 3:00 p.m.
      Quadratic residue codes in their prime.
      Harold Ward*, University of Virginia
      (849-94-192)
    • 3:30 p.m.
      Simplifications to ``A new approach to the covering radius$\ldots$''
      H. F. Mattson, Jr.*, Syracuse University
      (849-94-251)
    • 4:00 p.m.
      On extremal self-dual quaternary codes of lengths 18 to 28.
      W. Cary Huffman*, Loyola University of Chicago
      (849-94-223)
    • 4:30 p.m.
      The interplay of coding theory and algebraic topology.
      Jay A. Wood*, Bowdoin College
      (849-94-249)

  • Saturday May 20, 1989, 2:00 p.m.-3:20 p.m.
    Special Session on Algebraic Topology of Varieties, III
    Room 531, Damen Hall

    • 2:00 p.m.
      Equivariant rational homotopy of G Kahler manifolds.
      Melvin G. Rothenberg*, University of Chicago
      (849-57-267)
    • 2:30 p.m.
      Pseudofree group actions on four-manifolds.
      Slawomir Kwasik, Tulane University
      Reinhard Schultz*, Purdue University, West Lafayette
      (849-57-61)
    • 3:00 p.m.
      Homotopy K3 surfaces containing Sigma(2,3,7).
      Ronald Fintushel*, Michigan State University
      Ronald J. Stern, University of Utah
      (849-57-186)

  • Saturday May 20, 1989, 2:00 p.m.-4:20 p.m.
    Special Session on Partial Differential Equations, IV
    Room 239, Damen Hall

    • 2:00 p.m.
      A limiting viscosity approach for the Riemann problem in Eulerian gas dynamics.
      Athanassios Tzavaras*, University of Wisconsin, Madison
      Marshall Slemrod, University of Wisconsin, Madison
      (849-35-46)
    • 2:40 p.m.
      Microlocal Holmgren's Theorem for a class of hypo-analytic structures.
      Shiferaw Berhanu*, Temple University
      (849-35-245)
    • 3:20 p.m.
      A necessary condition for the solvability of certain operators with multiple characteristics.
      Gary B. Roberts*, University of Notre Dame
      (849-35-39)
    • 4:00 p.m.
      Inverse boundary value problems.
      Sagun Chanillo*, Rutgers University, New Brunswick
      (849-35-40)

  • Saturday May 20, 1989, 2:00 p.m.-4:50 p.m.
    Special Session on Quadratic Forms and Real Algebraic Geometry, IV
    Room 342, Damen Hall

    • 2:00 p.m.
      An introduction to blenders.
      Bruce Reznick*, University of Illinois, Urbana-Champaign
      (849-15-114)
    • 2:30 p.m.
      Quadratic forms over function-fields of elliptic and hyperelliptic curves.
      Jonathan E. Shick*, University of California at San Diego, La Jolla
      (849-12-64)
    • 3:00 p.m.
      Automorphism groups of positive definite integral quadratic forms.
      John S. Hsia*, Ohio State University, Columbus
      (849-11-62)
    • 3:30 p.m.
      Integral quadratic forms whose class and spinor genus coincide.
      Andrew G. Earnest*, Southern Illinois University, Carbondale
      (849-11-73)
    • 4:00 p.m.
      Even unimodular positive definite quadratic forms over real quadratic fields.
      David C. Hung*, State University of New York, Binghamton
      (849-11-63)
    • 4:30 p.m.
      Trace forms over Hilbertian and Henselian fields.
      Martin Kruskemper*, University of Saskatchewan
      (849-12-28)

  • Saturday May 20, 1989, 2:00 p.m.-5:20 p.m.
    Special Session on Nonlinear Analysis and its Applications, III
    Room 340, Damen Hall

    • 2:00 p.m.
      Fixed point theorems for set valued mappings.
      V. M. Sehgal*, University of Wyoming
      S. P. Singh, Memorial University of Newfoundland
      B. Watson, Memorial University of Newfoundland
      (849-54-164)
    • 2:30 p.m.
      Fixed points for nonexpansive type multi-valued mappings.
      Duane E. Anderson, University of Minnesota, Duluth
      K. L. Singh*, Fayetteville State University
      (849-47-83)
    • 3:00 p.m.
      Fixed point theorems and nonlinear ergodic theorems for nonlinear semigroups.
      Wataru Takahashi*, Tokyo Institute of Technology, Japan
      (849-47-224)
    • 3:30 p.m.
      Polynomials and analytic functions on Banach spaces.
      J. H. M. Whitfield*, Lakehead University
      (849-46-261)
    • 4:00 p.m.
      An alternative principle and some of its applications.
      Biagio Ricceri*, University of Messina, Saint'Agata-Messina, Italy
      (849-47-271)
    • 4:30 p.m.
      Non monotonicity of Fejer means in L superior p spaces.
      Leonede De Michele*, University of Milan, Italy
      Delfina Roux, University of Milan, Italy
      (849-42-274)
    • 5:00 p.m.
      Informal Discussion

  • Saturday May 20, 1989, 2:00 p.m.-3:10 p.m.
    Session on General Session
    Room 148, Damen Hall

    • 2:00 p.m.
      Regularities in the computer orbits of \v Cebysev pseudo-random number generators.
      T. Erber*, Illinois Institute of Technology
      D. Gavelek, Illinois Institute of Technology
      (849-68-14)
    • 2:15 p.m.
      Computer precision and algorithmic complexity of pseudo-random number generators.
      D. Gavelek*, Illinois Institute of Technology
      T. Erber, Illinois Institute of Technology
      (849-68-11)
    • 2:30 p.m.
      Generalized Kustaanheimo-Stiefel transformation.
      J. S. Rno*, University of Cincinnati
      (849-81-246)
    • 2:45 p.m.
      Central place fractals: Theoretical geography in an urban setting.
      Sandra Lach Arlinghaus*, Institute of Mathematical Geography, 2790 Briarcliff, Ann Arbor, Michigan
      (849-92-265)
    • 3:00 p.m.
      Riemannian superlogic.
      Stephen L. Weinberg*, Berkeley Academy of Artscience, Berkeley, California
      (849-83-09)
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