Monday, October 19, 2015

theoremoftheday.org Wagner's Theorem

[PDF]Wagner's Theorem - Theorem of the Day
www.theoremoftheday.org/.../Wagner/TotDWagner.pdf
THEOREM OF THE DAY. Wagner's Theorem A graph G is planar if and only if it contains neither K5 nor K3,3 as a graph minor. The graph above left is the 
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