The Chang-Skjelbred lemma and generalizations

Abstract

We review the Chang-Skjelbred lemma for torus-equivariant cohomology and discuss several generalizations of it: to other coefficients, other groups and also to syzygies in equivariant cohomology and the Atiyah-Bredon sequence.

9 pages; based on a talk given at an AMS Sectional Meeting, March 2022

References in corpus (2)

• Syzygies in equivariant cohomology in positive characteristic
• The syzygy order of big polygon spaces