GenericGraph.is_circulant() test

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/14250">trac #14250</a>.



Reported by: ncohen

Component: graph theory

CC: 

Report Upstream: N/A

Authors: Nathann Cohen

Dependencies: <a href="http://trac.sagemath.org/sage_trac/ticket/14251">trac #14251</a>

Work issues: 

Reviewers: Frédéric Chapoton

Merged in: sage-5.9.beta1

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14250/trac_14250.patch">trac_14250.patch: </a> by ncohen at 20130314T11:28:04</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14250/trac_14250-review-fc.patch">trac_14250-review-fc.patch: </a> by chapoton at 20130315T20:49:49</li></ol>