User makoto ozawa - MathOverflow most recent 30 from http://mathoverflow.net 2013-05-18T16:01:30Z http://mathoverflow.net/feeds/user/25322 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/109218/unknotting-number-and-crossing-number/109232#109232 Answer by Makoto Ozawa for Unknotting number and crossing number Makoto Ozawa 2012-10-09T14:44:39Z 2012-10-09T14:44:39Z <p>You can see the answer in Proposition 2.1 of <a href="http://arxiv.org/abs/0705.3337" rel="nofollow">link text</a></p> http://mathoverflow.net/questions/103049/knot-theory-question-bridge-number-vs-min-generators-of-fundamental-group-of-co/103067#103067 Answer by Makoto Ozawa for Knot theory question: bridge number vs. min generators of fundamental group of complement Makoto Ozawa 2012-07-25T04:05:40Z 2012-07-25T04:05:40Z <p>It is not a problem, but this is a problem.</p> <p>A question posed by Cappell and Shaneson asks whether the bridge number of a given link equals the minimal number of meridian generators of its group.</p> <p><a href="http://ccms.claremont.edu/topology-seminar/Bridge-numbers-links-and-meridian-ranks-link-groups" rel="nofollow">http://ccms.claremont.edu/topology-seminar/Bridge-numbers-links-and-meridian-ranks-link-groups</a></p> http://mathoverflow.net/questions/109218/unknotting-number-and-crossing-number/109232#109232 Comment by Makoto Ozawa Makoto Ozawa 2012-10-12T00:58:37Z 2012-10-12T00:58:37Z What a good structural proof! You gave a new view point.