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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Mar 28, 2010 at 3:54 vote accept Leah Wrenn Berman
Mar 20, 2010 at 16:55 answer added Tomaž Pisanski timeline score: 1
Mar 20, 2010 at 9:42 comment added Tomaž Pisanski @Michael: "Voltage graph" is a combinatorial tool composed of the base graph and the assignment of group elements to arcs in such a way that the opposing arcs of an edge are assigned inverse group elements. It completely describes the covering graph together with the regular covering projection. The term is explained and used a lot in the book "Topological Graph Theory" by Gross and Tucker.
Mar 20, 2010 at 0:41 comment added Michael Lugo It might help if you define voltage graphs or link to a definition of them. (It might not, though, because perhaps anybody who can answer this question already knows what a voltage graph is.)
Mar 19, 2010 at 22:04 history asked Leah Wrenn Berman CC BY-SA 2.5