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started a section on the homotopy type of the diffeomorphism group and recorded the case for closed orientable surfaces
added a few more facts under Homotopy type and mapping class group, all taken from Hatcher’s review (pdf), also dug out some of the references (unfortunately no citation detail in that review).
Is there a more recent/more comprehensive such review? Textbook account? (Unfortunatley Hatcher’s review is not dated.)
There’s 2012 in the URL.
And on his homepage it says
A talk at the 50th Cornell Topology Festival in May 2012 sketching some highlights of what’s known about the homotopy types of diffeomorphism groups of smooth manifolds. A full history would of course be impossible in an hour talk.
Ah. Should have seen that. Thanks! Am adding it now…
I have added the following pointers, claiming dis-proof of the analogue of the Smale conjecture in 4d:
Tadayuki Watanabe, Some exotic nontrivial elements of the rational homotopy groups of $Diff(S^4)$ (arXiv:1812.02448)
Tadayuki Watanabe, Addendum to: Some exotic nontrivial elements of the rational homotopy groups of $Diff(S^4)$ (homological interpretation) (arXiv:2109.01609)
added pointer to today’s
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