AMS Sectional Meeting Program by Special Session
Current as of Tuesday, April 12, 2005 15:08:34
Program 
Deadlines 
Inquiries: meet@ams.org
1989 Central Section Meeting
Chicago, IL, May 1920, 1989
Meeting #849
Associate secretaries:
Andy R Magid, AMS
amagid@ou.edu
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
(84911168)

7:30 a.m.
Witt kernels of algebraic extensions.
David B. Leep*, University of Kentucky
(84912142)

8:00 a.m.
On the structure of the Clifford algebra over a commutative ring.
Alexander J. Hahn*, University of Notre Dame
(8491513)

8:30 a.m.
Galois groups over Cfields.
Tara L. Smith*, Ohio State University, Columbus
J\'an Min\'a\v c, University of Western Ontario
(8491232)

9:00 a.m.
Informal Discussion

9:30 a.m.
Picard groups of Witt rings.
Robert W. Fitzgerald*, Southern Illinois University, Carbondale
(84911110)

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 supinfpolynomially varying solution to Hilbert's $17$th problem.
Charles N. Delzell*, Louisiana State University, Baton Rouge
(84914160)

2:30 p.m.
Places on *fields and the real holomorphy ring.
Thomas C. Craven*, University of Hawaii, Honolulu
(8491226)

3:00 p.m.
Orders and order closures for not necessarily formally real fields.
Ron Brown*, University of Hawaii, Honolulu
(84912113)

3:30 p.m.
Witt rings and spaces of orderings of projective planes.
Franz Kalhoff*, University of Dortmund, Federal Republic of Germany
(84911203)

4:00 p.m.
Signatures of higher level on rings with many units.
M. Marshall, University of Saskatchewan
L. Walter*, University of Saskatchewan
(8491319)

4:30 p.m.
Higher level orders on noncommutative rings.
Victoria A. Powers*, Emory University
(84906177)

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
(84913140)

7:30 a.m.
Nonarchimedean real analysis.
Robby Robson*, Oregon State University
(8491424)

8:00 a.m.
Nash groups.
J. Madden*, Indiana University, South Bend
C. Stanton, Indiana University, South Bend
(84922143)

8:30 a.m.
Some new VapnikChervonenkis classes.
Gilbert Stengle*, Lehigh University
Joseph Yukich, Lehigh University
(8491427)

9:00 a.m.
Spinor norms of similarities.
D. B. Shapiro*, Ohio State University, Columbus
I. Alarcon, Ohio State University, Columbus
(8491578)

9:30 a.m.
Round quadratic forms under algebraic extensions.
Burkhard Alpers*, University of Saskatchewan
(8491144)

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, UrbanaChampaign
(84915114)

2:30 p.m.
Quadratic forms over functionfields of elliptic and hyperelliptic curves.
Jonathan E. Shick*, University of California at San Diego, La Jolla
(8491264)

3:00 p.m.
Automorphism groups of positive definite integral quadratic forms.
John S. Hsia*, Ohio State University, Columbus
(8491162)

3:30 p.m.
Integral quadratic forms whose class and spinor genus coincide.
Andrew G. Earnest*, Southern Illinois University, Carbondale
(8491173)

4:00 p.m.
Even unimodular positive definite quadratic forms over real quadratic fields.
David C. Hung*, State University of New York, Binghamton
(8491163)

4:30 p.m.
Trace forms over Hilbertian and Henselian fields.
Martin Kruskemper*, University of Saskatchewan
(8491228)
Inquiries: meet@ams.org