Subject: Diff(S^n)
Date: Mon, 20 Jan 2003 10:43:23 -0800
From: Boris Botvinnik <botvinn@poincare.uoregon.edu>

This is a question to the experts on Diff(S^n).  Let x_0 be a point in
S^n. There is the following subgroup of Diff(S^n):

Diff_{x_0}(S^n):={ \phi\in Diff(S^n) | \phi(x_0)=x_0, d\phi_{x_0}=Id}

This subgroup is clearly related to Diff(S^n).

Does anybody know rational homology of Diff_{x_0}(S^n) for n>4 ?

I will appreciate the answer.

Boris Botvinnik