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Oct
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comment “faces” of a non-planar graph
For an explanation of the Genus, you can also take a look at personal.kent.edu/~rmuhamma/GraphTheory/MyGraphTheory/… . Is a genus the same intuitively as putting a vertex at each crossing, thus making the graph planar with more vertices. The minimum number of vertices needed to be put is the genus of G , is that correct?
Sep
28
answered Dumb percentage question?
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21
awarded  Supporter
Sep
19
answered How many sequences :$a_1,a_2,…,a_8$
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Sep
18
answered Network flow: Why is min-cut determined by unsaturated edges?