MONDAY, APRIL 11

Elementary Methods: (B. Mezhericher)
NO SEMINAR THIS WEEK.

Physics Colloquium:
John Thomas (Duke)
"High-temperature superfluidity in ultra-cold Fermi gases"
4:15 p.m., 428 PUPIN HALL
Coffee served at 3:30 on the 7th floor hall, 705 PUPIN HALL.

Applied Mathematics Colloquium:
Mary Pugh (Toronto)
"Blowing-up exact solutions of long-wave unstable thin film equations"
2:45 p.m., 214 Mudd

Mathematics of Finance Practitioners Seminar: (M. Smirnov)
Alain Bensoussan (UTexas Dallas, Former Chairman of The European Space Agency)
"Risk management methods and techniques"
7:40-9:00 p.m., 207 Math.

THURSDAY, APRIL 14

Geometric Topology:  (C. Leininger)
Mikhail V. Belolipetsky (Hebrew University, Jerusalem)
"Covolumes of maximal arithmetic subgroups and subgroup growth in
     semisimple Lie groups"
NOTE SPECIAL TIME, DAY AND LOCATION: 11:00 a.m., 622 Math.

DOUBLE HEADER I: Columbia-Stony Brook Junior Geometry Seminar:
Jihyeon Yang  (Stony Brook)
"The geometry of semigroups"
11:30 a.m., Common room, Mathematics Department, SUNY, Stony Brook
This will be at Stony-Brook today.

DOUBLE HEADER II: Columbia-Stony Brook Junior Geometry Seminar:
Debbie Grier
"Introduction to tropical geometry"
2:30 p.m., Common room, Mathematics Department, SUNY, Stony Brook
This will be at Stony-Brook today.

Geometry and Analysis: (M.T. Wang, M.P. Tsui)
William Minicozzi (John Hopkins)
"The Calabi-Yau conjecture for embedded surfaces"
4:30 p.m., 507 Math.

Joint COLUMBIA-CUNY-NYU (Rotating among the 3 Universities)
Number Theory (D. Goldfeld, V. Kolyvagin, P. Sarnak,  L. Szpiro)
Barry Mazur (Harvard)
"Where are all these rational points of elliptic curves coming from?"
Columbia, 312  Math, 5:30-7:00 p.m.,
Tea will be served in the Math Lounge, Room 508, 5:00 p.m.

Mathematics of Finance Practitioners Seminar: (M. Smirnov)
Questions and answers about projects
7:40-9:00 p.m., 207 Math.

FRIDAY, APRIL 15

Probability: (P. Bank)
Richard Sowers (Illinois, Urbana-Champaign)
"Random perturbations of pseudoperiodic flows"
11:00 a.m., 520 Math
Coffee and tea will be served at 10:30 a.m., 508 Math.

DOUBLE HEADER l: Geometric Topology:  (C. Leininger)
Bruce Kleiner (Michigan & NYU)
"The geometry of right-angled Artin groups"
11:00 a.m., 507 Math.

TRIPLE HEADER I: Algebraic Geometry:  (M. Thaddeus)
Hans Georg Freiermuth
"On compactifications of the space of framed vector bundles on the projective plane"
2:00 p.m., 520 Math. 

TRIPLE HEADER III: Algebraic Geometry:  (M. Thaddeus)
Johan Martens
"Instanton counting and nonabelian localization"
5:00 p.m., 520 Math.