Logo

Mathematical Sciences Research Institute

Home » Emphasis Period Seminar: Donaldson-Thomas invariants are weighted Euler Characteristics

Seminar

Emphasis Period Seminar: Donaldson-Thomas invariants are weighted Euler Characteristics March 18, 2009
Location: MSRI: Baker Board Room
Speaker(s) Kai Behrend
Description No Description

Video
No Video Uploaded
Abstract/Media

I will explain why the counting invariants for sheaves on Calabi-Yau threefolds a la Donaldson-Thomas are equal to weighted Euler characteristics of the moduli spaces involved. Each sheaf, i.e., each point in the moduli space, contributes an integer weight to the sheaf count. In good cases this integer weight is related to the Milnor fibre of a Chern-Simons type function.

No Notes/Supplements Uploaded No Video Files Uploaded