Timeline for The cone on a manifold

13 events

when toggle format	what		by	license	comment
May 1, 2017 at 19:38	history	edited	Ben McKay	CC BY-SA 3.0	clarified the smooth structure
Dec 6, 2015 at 12:34	history	edited	Ben McKay	CC BY-SA 3.0	Corrected spelling
Mar 3, 2015 at 19:53	history	edited	Ricardo Andrade		added missing top-level tag
S Mar 3, 2015 at 19:00	history	suggested	Ali Taghavi		I add a tag
Mar 3, 2015 at 18:59	review	Suggested edits
S Mar 3, 2015 at 19:00
Nov 3, 2013 at 12:33	comment	added	Ryan Budney		Without the Poincare conjecture you can say $X$ is a homotopy-sphere, that's what your argument gives you.
Nov 3, 2013 at 12:29	history	edited	Ben McKay	CC BY-SA 3.0	added 30 characters in body
Nov 1, 2013 at 15:43	comment	added	Sam		@shu : I doubt it.
Nov 1, 2013 at 15:42	comment	added	shu		@sam, you are right I forgot it. But is there a proof without using Poincare conjecture?
Nov 1, 2013 at 15:31	comment	added	Sam		@shu : The Poincare conjecture also requires $X$ to be simply-connected.
Nov 1, 2013 at 15:30	answer	added	Sam		timeline score: 24
Nov 1, 2013 at 14:54	comment	added	shu		if $CX$ is smooth, the intersection homology will egale to singular homology. Hence, all the Betti number of $X$ is 0 except the 0 and top degree. Thus...by Poincare conjecture, $X$ is a sphere. But I think there should be a simple argument.
Nov 1, 2013 at 14:04	history	asked	Ben McKay	CC BY-SA 3.0