Description
Title: Weight calculations and the tautological ring
Abstract: Most questions about the intersection theory of the toroidal compactifications of A_g are unanswered. In this talk, I will explain how we can solve most of these for the simplest compactification given by torus rank 1 degenerations. The main technique is an extended theory of weights. We can compute these explicitly in the tautological ring, and then use Fourier transform to extend the results to the whole Chow ring. This is a continuation of S. Molcho's talk, and is based on joint work with Y. Bae, J. Feusi and S. Molcho