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when toggle format what by license comment
May 4, 2018 at 5:47 answer added Ranveer Singh timeline score: 2
Nov 23, 2014 at 10:08 comment added Sasha Expanding darij grinberg's comment --- it looks like the answer is $(-1)^n$ where $n$ is the number of "$v$-antioriented edges", i.e. the number of edges orientation of which should be switched to make all edges oriented from $v$.
Nov 23, 2014 at 3:47 history edited Allen Knutson CC BY-SA 3.0
added 209 characters in body
Nov 23, 2014 at 2:37 answer added Chris Godsil timeline score: 2
Nov 23, 2014 at 1:51 history asked Allen Knutson CC BY-SA 3.0