Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How would I prove the following: If the normalization of $X$ can be covered by $G$-invariant quasiprojective open subsets, then the spectral sequence $$E_{2}^{pq} = H^{p}(BG, IH^{q}(X)) \Rightarrow IH_{G}^{p+q}(X)$$ converging to $IH^{*}(E_{n}G \times _X{G})$ degenerates at the $E_2$ term.

This is because of decomposition?

share|cite|improve this question
I suspect this question would be acceptable at MathOverflow. – Akhil Mathew Jul 20 '11 at 18:12

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.