Past Events

The Yoshida lift is a theta lift that takes a pair of automorphic forms on a definite quaternion algebra to a holomorphic Siegel modular form. We show that a natural refinement of the classical Yoshida lift in fact preserves p-integrality in a...

In these talks we describe our proofs of the Hanna Neumann Conjecture. This conjecture of the late 1950's can be described both as a problem in group theory or as one in graph theory. Our first proof is longer and interprets the problem using...

In this talk a lowest-degree pair of nonconforming finite elements on quadrilaterals and hexahedrons will be introduced for the approximation of the Stokes equations. Also, an equal order pair of nonconforming finite element pair will be introduced...

This is a working seminar on the homotopy theory of moduli spaces

Natural resource problems typically must be modeled using data that is often incomplete, asynchronous and collected at different spatial and temporal scales with differing levels of measurement uncertainty. Both deterministic and stochastic models...

In these talks we describe our proofs of the Hanna Neumann Conjecture. This conjecture of the late 1950's can be described both as a problem in group theory or as one in graph theory. Our first proof is longer and interprets the problem using...

Implicit time stepping applied to discretized incompressible fluid flow problems results in discrete Stokes-like (saddle-point, KKT) problems. There is a class of so-called Projection Methods in which these Stokes-like problems are efficiently...

I will present a joint work with Behrend. For any smooth projective variety, we construct a differential graded scheme (stack) structure on the moduli space of complexes of coherent sheaves. The construction uses the Hochschild cochain complex of A...

This course is an introduction to the modeling of biochemical reactions and reaction networks. Starting from an elementary discussion of biochemical reactions, basic concepts of biochemical modeling will be presented. Ordinary differential equation...