most recent 30 from http://mathoverflow.net 2013-05-21T17:33:35Z http://mathoverflow.net/feeds/question/109470 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/109470/directed-graphs-and-compact-lie-groups A. H. Najmi 2012-10-12T16:57:18Z 2012-10-12T18:15:20Z

<p>Is there a method for associating the edges and vertices of an arbitrary directed graph with the irreducible representations of a compact Lie group and the intertwiners of the adjacent edge representations, respectively. In Physicists' terms is there a way to nterpret an arbitrary directed graph as a Penrose spin network</p>

http://mathoverflow.net/questions/109470/directed-graphs-and-compact-lie-groups/109477#109477 Bruce Westbury 2012-10-12T18:15:20Z 2012-10-12T18:15:20Z

<p>This is a very broad question and there is a lot I could say on the topic. I suggest as a starting point you read the book:</p> <p>Cvitanović, Predrag . Group theory. Birdtracks, Lie's, and exceptional groups. Princeton University Press, Princeton, NJ, 2008. </p>