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AMS Sectional Meeting Program by Special Session

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

Special Session on Quadratic Forms and Real Algebraic Geometry

  • 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
    • 7:30 a.m.
      Witt kernels of algebraic extensions.
      David B. Leep*, University of Kentucky
    • 8:00 a.m.
      On the structure of the Clifford algebra over a commutative ring.
      Alexander J. Hahn*, University of Notre Dame
    • 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
    • 9:00 a.m.
      Informal Discussion
    • 9:30 a.m.
      Picard groups of Witt rings.
      Robert W. Fitzgerald*, Southern Illinois University, Carbondale
  • 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
    • 2:30 p.m.
      Places on *-fields and the real holomorphy ring.
      Thomas C. Craven*, University of Hawaii, Honolulu
    • 3:00 p.m.
      Orders and order closures for not necessarily formally real fields.
      Ron Brown*, University of Hawaii, Honolulu
    • 3:30 p.m.
      Witt rings and spaces of orderings of projective planes.
      Franz Kalhoff*, University of Dortmund, Federal Republic of Germany
    • 4:00 p.m.
      Signatures of higher level on rings with many units.
      M. Marshall, University of Saskatchewan
      L. Walter*, University of Saskatchewan
    • 4:30 p.m.
      Higher level orders on noncommutative rings.
      Victoria A. Powers*, Emory University
  • 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
    • 7:30 a.m.
      Nonarchimedean real analysis.
      Robby Robson*, Oregon State University
    • 8:00 a.m.
      Nash groups.
      J. Madden*, Indiana University, South Bend
      C. Stanton, Indiana University, South Bend
    • 8:30 a.m.
      Some new Vapnik-Chervonenkis classes.
      Gilbert Stengle*, Lehigh University
      Joseph Yukich, Lehigh University
    • 9:00 a.m.
      Spinor norms of similarities.
      D. B. Shapiro*, Ohio State University, Columbus
      I. Alarcon, Ohio State University, Columbus
    • 9:30 a.m.
      Round quadratic forms under algebraic extensions.
      Burkhard Alpers*, University of Saskatchewan
  • 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
    • 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
    • 3:00 p.m.
      Automorphism groups of positive definite integral quadratic forms.
      John S. Hsia*, Ohio State University, Columbus
    • 3:30 p.m.
      Integral quadratic forms whose class and spinor genus coincide.
      Andrew G. Earnest*, Southern Illinois University, Carbondale
    • 4:00 p.m.
      Even unimodular positive definite quadratic forms over real quadratic fields.
      David C. Hung*, State University of New York, Binghamton
    • 4:30 p.m.
      Trace forms over Hilbertian and Henselian fields.
      Martin Kruskemper*, University of Saskatchewan

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