most recent 30 from http://mathoverflow.net 2013-05-19T17:01:00Z http://mathoverflow.net/feeds/user/30566 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/119232/how-to-proof-it-is-homeomorphic-to-sn lanse 2013-01-18T09:24:15Z 2013-01-18T09:24:15Z

@Yemon Choi:Could you tell me some website to get the answer of the above question? I have no idea for the quetion.

http://mathoverflow.net/questions/117457/manifolds-with-two-coordinate-charts/118624#118624 lanse 2013-01-12T00:59:41Z 2013-01-12T00:59:41Z

sorry,i am thoughtless.how to delete my answer?