COLUMBIA UNIVERSITY

Department of Mathematics

S E M I N A R S -

Week of November 30, 1998

MONDAY, November 30

Group Number Theory: (H. Bass, N. Benakli)
Alex Gamburd (Princeton)
"Spectra of elements in the group rings of SU(2) and SL(2, Z)"
4:00-5:30 p.m., 507 Math.

Number Theory: (D. Goldfeld, H. Jacquet, S.W. Zhang)
Henryk Iwaniec (Rutgers)
"Bounds for L-functions"
5:30 p.m., 507 Math. Tea will be served at 5:00 p.m., 508 Math.

TUESDAY, December 1

Eilenberg Lectures:
Shing-Tung Yau (Harvard & Columbia)
"Non-Linear differential equations and geometry"
4:30 p.m., 507 Math.

WEDNESDAY, December 2

Colloquium:
Serge Tabachnikov (Arkansas)
"Projectively equivalent metrics, the geodesic flow on an ellipsoid and hyperbolic geometry"
5:30 p.m., 507 Math. Tea will be served at 5:00 p.m., 508 Math.

THURSDAY, December 3

Geometry and Analysis Seminar: (R. Hamilton, M. Kuranishi, D.H. Phong)
Marco Avellaneda (Courant)
"Some thoughts on entropy, inverse problems, and PDE's"
2:30 p.m., 507 Math.

FRIDAY, December 4

Arithmetic Algebraic Geometry: (L. Szpiro, S.W. Zhang)
Ambrus Pál
"The product theorem: Part II" - 11:00 a.m., 507 Math.

Geometric Topology: (J. Birman, B. Mangum)
Sergio Fenley (Princeton)
"Foliations with good geometry"
2:30 p.m., 405 Math.

Algebraic Geometry: (R. Friedman, M. Thaddeus)
Tony Pantev (Penn)
"Irreducibility of monodromy actions on non-abelian cohomology"
NOTE SPECIAL TIME: 2:00 p.m., 417 Math.