Previous Special Year Seminar

Feb
13
2007

Motivic Cohomology

The Syntomic Regulator for K_1 of Surfaces
2:00pm|S-101

We give an explicit formula for the syntomic regulator of certain elements in the first algebraic K-theory group of a smooth complete surface over the ring of integers of a p-adic field. The formula uses the theory of Coleman integration and the...

Feb
06
2007

Motivic Cohomology

An Approach to the Conservation of the Nearby Motive Functor
2:00pm|S-101

We present a program to prove the following conjecture: Let $S$ be the spectrum of a DVR of equi-characteristic zero with field of fraction $K$ and residue field $k$. The functor (associated to the choice of a uniformizing) $\Psi:DM_{gm}(K) \to DM_...

Dec
14
2006

Birational Geometry

Finite Generation VI: Moduli Spaces
2:00pm|S-101

We will finish the sketch of the proof of existence of a geometrically meaningful compactification of the moduli space of canonically polarized smooth varieties.

Dec
13
2006

Complex Algebraic Geometry

Parabolic Chern Character of the de Rham Bundles
11:00am|S-101

Characteristic classes of Flat bundles on smooth algebraic varieties are defined in various cohomology theories. We consider the de Rham cohomology, the Deligne cohomology and the rational Chow groups and study the classes. We focus on the special...

Dec
07
2006

Complex Algebraic Geometry

Witten Equation and Singularity Theory
Yongbin Ruan
12:00pm|S-101

In 1991, Witten proposed a famous conjecture (solved by Kontsevich) related the intersection theory of Deligne-Mumford moduli space to KDV-integrable hierearchy. To generalize his conjecture, Witten proposed a remarkable PDE based any...

Nov
29
2006

Complex Algebraic Geometry

Singularities and Spaces of Jets
1:00pm|S-101

I will give an introduction to spaces of jets of algebraic varieties, explining their relevance for birational geometry. In particular, I will explain why these spaces are useful in the study of singularities.