most recent 30 from http://mathoverflow.net 2013-05-25T04:23:48Z http://mathoverflow.net/feeds/question/29348 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/29348/what-is-a-right-handed-dehn-twist-of-a-cut-curve-of-a-riemann-surface Jun Lu 2010-06-24T07:03:35Z 2010-06-24T09:23:19Z

<p>Let $\Sigma_g$ be a Riemann surface of genus g, and $C$ is a cut curve of $\Sigma_g$, i.e. an oriented simple close curve. </p> <p>What is a right-handed Dehn twist of $C$ of $\Sigma_g$? </p>

http://mathoverflow.net/questions/29348/what-is-a-right-handed-dehn-twist-of-a-cut-curve-of-a-riemann-surface/29355#29355 Bugs Bunny 2010-06-24T08:52:28Z 2010-06-24T09:23:19Z

<p>Cut the curve with a scalpel, going along the curve (it is oriented), rotate the right side 360 degrees, and glue it back in...</p>