most recent 30 from http://mathoverflow.net 2013-05-25T02:01:18Z http://mathoverflow.net/feeds/user/21445 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/88614/dehn-twist-in-the-sense-of-geometric-group-theory-and-a-graph-of-groups Peter 2012-02-16T09:14:53Z 2012-02-24T09:40:18Z

<p>Hello!</p> <p>Does anyone knows a good book or script about Dehn Twists in the sense of graphs. More precisely: I need to know how a Dehn Twist yields an automorphism of a group or a subgroup of a group. I want to know something about the realtionship between dehn twists and graph of groups.</p> <p>I know that my request is not nice formulated, but i didn't found any good introduction about this theme in the internet yet. I always get defintions for dehn twists in the sense of surfaces. But i don't know, how to conclude or educe something about groups in the sense of geometric group theory.</p> <p>Thanks for help.</p>