AMS Sectional Meeting Program by Day
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1997 Spring Western Sectional Meeting
Corvallis, OR, April 1920, 1997
Meeting #921
Associate secretaries:
William A Harris, Jr, AMS
wharris@math.usc.edu
Sunday April 20, 1997

Sunday April 20, 1997, 7:30 a.m.12:00 p.m.
Registration
Room 108, Kidder Hall, Mathematics Learning Center

Sunday April 20, 1997, 7:30 a.m.12:00 p.m.
Exhibit and Book Sale
Room 108, Kidder Hall, Mathematics Learning Center

Sunday April 20, 1997, 8:00 a.m.10:50 a.m.
Special Session on Geometric Methods in Mathematical Physics, III
Room 109, Strand Agricultural Hall
Organizers:
Juha Pohjanpelto, Oregon State University juha@math.orst.edu

8:00 a.m.
The braid group, periodic orbits, and the planar Nbody problem
Richard W. Montgomery*, University of California, Santa Cruz
(9215831)

8:25 a.m.
Group Drift over the Ergodic Domains and Attractors
Serge Preston*, Portland State University, Portland, OR
(92170122)

8:50 a.m.
Reduction by stages
Tudor S Ratiu*, University of California, Santa Cruz
(92158158)

9:15 a.m.
Periodic orbits of Hamiltonian systems and dynamics in magnetic fields
Viktor L. Ginzburg*, University of California, Santa Cruz
(92158114)

9:40 a.m.
Hamiltonian reduction of Einstein's equations of general relativity
Arthur E. Fischer*, University of California, Santa Cruz
Vincent Moncrief, Yale University
(92183166)

10:05 a.m.
A Conformal Mapping Problem Arising in String Theory.
Jeff Rabin*, University of California, San Diego.
(92181155)

10:30 a.m.
Homological vector fields and their applications
Arkady Vaintrob*, New Mexico State University and Brigham Young University
(9215846)

Sunday April 20, 1997, 8:00 a.m.10:50 a.m.
Special Session on Operator Algebras, III
Room 111, Strand Agricultural Hall
Organizers:
Huaxin Lin, University of Oregon hlin@bright.uoregon.edu
Christopher Phillips, University of Oregon phillips@bright.uoregon.edu

8:00 a.m.
Subfactors and Partially Commuting Squares
Peter T Akemann*, University of California, Berkeley
(92146126)

8:30 a.m.
$C^*$algebra generated by orthogonal projections
Nikolai Vasilevski*, Departamento de Matematicas, CINVESTAV del I.P.N., Mexico
(9214618)

9:00 a.m.
Computing $K$theory contingencies to stable relations
Terry A Loring*, University of New Mexico
Soren Eilers, University of Copenhagen
(9214655)

9:30 a.m.
Hilbert modules with involution
Nik Weaver*, UCLA/Washington U
(9214635)

10:00 a.m.
Spectral invariance of stabilizations of dense subalgebrasof C*algebras
Larry B. Schweitzer*,
(92146177)

10:30 a.m.
Discussion

Sunday April 20, 1997, 8:45 a.m.10:40 a.m.
Special Session on Inverse Problems, III
Room 226, Strand Agricultural Hall
Organizers:
Adel Faridani, Oregon State University faridani@math.orst.edu
David V. Finch, Oregon State University finch@math.orst.edu

8:45 a.m.
On Characterization of DirichlettoNeumann maps for Planar Regions
David V Ingerman*, University of Washington
(9213554)

9:15 a.m.
On the null space in linearized anisotropic crosswell traveltimetomography
Kenneth P. Bube*, University of Washington
Mark A. Meadows, Chevron Petroleum Technology Company
(9218698)

9:45 a.m.
Spectra of periodic differential operators and photonic crystals
Peter Kuchment*, Wichita State University
Leonid Kunyansky, Wichita State University
(9217842)

10:15 a.m.
Electrical Impedance Tomography: The two dimensional case
Gunther Uhlmann*, University of Washington
(9213578)

Sunday April 20, 1997, 8:50 a.m.10:50 a.m.
Special Session on Algebraic and Elementary Number Theory, III
Room 115, Social Science Building
Organizers:
Richard A. Mollin, University of Calgary ramollin@math.ucalgary.ca
Peter J. Shiue, University of Nevada, Las Vegas shiue@nevada.edu

8:50 a.m.
On an Optimality Property of Ramanujan Sums.
Gennady Bachman*, University of Nevada at Las Vegas
(9211117)

9:15 a.m.
Some identities connecting partition functions to other number theoretic functions
Neville Robbins*, San Francisco State University
(9211164)

9:40 a.m.
Cyclic Indicator and Partition Functions
Leetsch C. Hsu,
Peter J.S. Shiue*, University of Nevada, Las Vegas
(9211177)

10:05 a.m.
Periods of Sequences Generated by Two Special Mappings
WunSeng Chou*, Academia Sinica
Peter J.S. Shiue, University of Nevada, Las Vegas
(92111139)

10:30 a.m.
Discussion

Sunday April 20, 1997, 8:50 a.m.10:45 a.m.
Special Session on Octonions and Clifford Algebras, III
Room 132, Strand Agricultural Hall
Organizers:
Tevian Dray, Oregon State University tevian@math.orst.edu
Corinne Manogue, Oregon State University corinne@physics.orst.edu

8:50 a.m.
Duality, triality and the fourcolor theorem
John C. Baez*, University of California, Riverside
(9210519)

9:20 a.m.
The exceptions that prove the rule
Anthony Sudbery*, University of York, United Kingdom
(92117129)

9:50 a.m.
Octonions and Exceptional Structures
Frank D Smith, Jr.*,
(9211715)

10:20 a.m.
Exceptional nonlinear superconformal and quasi superconformal algebras and their realizations
Murat Gunaydin*, Penn State Physics, University Park
(92120123)

Sunday April 20, 1997, 9:00 a.m.10:50 a.m.
Special Session on Geometric Analysis, III
Room 222, Strand Agricultural Hall
Organizers:
Harold R. Parks, Oregon State University parks@math.orst.edu
Donald C. Solmon, Oregon State University solmon@math.orst.edu

9:00 a.m.
Approximation by spherical waves
Mark Agranovskii, BarIlan University, Israel
Carlos A. Berenstein, University of Maryland, College Park
Peter Kuchment*, Wichita State University
(9215843)

9:40 a.m.
Development of Palgebra Lie
Boris S Khots*,
(92122164)

10:20 a.m.
Discussion

Sunday April 20, 1997, 9:00 a.m.10:50 a.m.
Special Session on Singular Perturbations, Theory and Applications, III
Room 211, Strand Agricultural Hall
Organizers:
Leonid Viktorovich Kalachev, University of Montana leonid@selway.umt.edu
Robert E. O'Malley, Jr., University of Washington omalley@amath.washington

9:00 a.m.
More Approximations for Special Functions
Harry Gingold*, University of West Virginia
(9214161)

9:30 a.m.
On the Rate of Convergence of Borel Approximants
W. Balser, University of Ulm, Germany
D. A. Lutz*, San Diego State University
R. Schaefke, University Louis Pasteur, France
(9214172)

10:00 a.m.
Stokes multipliers of a generalized Weber equation with a large parameter
Tatsuhiko J Tabara*, Golden Gate University
(92134173)

10:30 a.m.
A New Approach in the Theory of Asymptotic Methods for Nonlinear Differential Equations and Painleve Equations in Particular
Alisher S. Abdullayev*, National University, Sacramento
(9214167)

Sunday April 20, 1997, 11:00 a.m.11:50 a.m.
Invited Address
Advances in the computation of area minimizing hypersurfaces
Gilfillan Auditorium, Wilkinson Hall
Harold R. Parks*, Oregon State University
(9214940)

Sunday April 20, 1997, 2:00 p.m.2:50 p.m.
Invited Address
Exponential asymptotics
Gilfillan Auditorium, Wilkinson Hall
Robert E. O'Malley*, University of Washington
(9210008)

Sunday April 20, 1997, 3:00 p.m.5:00 p.m.
Special Session on Octonions and Clifford Algebras, IV
Room 109, Strand Agricultural Hall
Organizers:
Tevian Dray, Oregon State University tevian@math.orst.edu
Corinne Manogue, Oregon State University corinne@physics.orst.edu

3:00 p.m.
Discussion

4:00 p.m.
Computer Demonstrations

Sunday April 20, 1997, 3:00 p.m.4:50 p.m.
Special Session on Operator Algebras, IV
Room 111, Strand Agricultural Hall
Organizers:
Huaxin Lin, University of Oregon hlin@bright.uoregon.edu
Christopher Phillips, University of Oregon phillips@bright.uoregon.edu

3:00 p.m.
A noncommutative nnomial formula
Carla Emilia Farsi*, University of Colorado
(9214696)

3:30 p.m.
Rieffel's trace formula and theta functions
Samuel G. Walters*, University of Northern British Columbia
(9214679)

4:00 p.m.
Ktheory for translation algebras and its applications
Guoliang Yu*, University of Colorado, Boulder
(9211934)

4:30 p.m.
Kirillov Theory and Transformation Group C*Algebras
Jeffrey S Fox*, University of Colorado, Boulder
(92122147)

Sunday April 20, 1997, 3:00 p.m.4:50 p.m.
Special Session on Singular Perturbations, Theory and Applications, IV
Room 211, Strand Agricultural Hall
Organizers:
Leonid Viktorovich Kalachev, University of Montana leonid@selway.umt.edu
Robert E. O'Malley, Jr., University of Washington omalley@amath.washington

3:00 p.m.
Weakly Nonlinear Waves for Hyperbolic Conservation Laws With Rapidly Varying Parameters
J. Kevorkian*, University of Washington
D. L. Bosley, Harvey Mudd College
(9213566)

3:30 p.m.
Singular Perturbation Methods for Bursting Systems
Mark Pernarowski*, Montana State Univesity
(9213557)

4:00 p.m.
Asymptotics of the Eigenvalues of the Rotating Harmonic Oscillator
Mark Dunster*, San Diego State University
(9214158)

4:30 p.m.
Asymptotic approximation for second order matrix differential equations
Uri Elias*, Technion, Israel Institute of Technology
Harry Gingold, West Virginia University
(9213413)
Inquiries: meet@ams.org