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each vertex goes to another vertex degrees are the same shapes are mapped too

to prove two graphs are isomorphic check the degree lists….if they match find a mapping between the two graphs

Euler path = simple path which goes through each edge exactly once Euler circuit = closed Euler path Theorem: A graph that has an Euler circuit must have all vertices of even degree

Graph: If 2 vertices of odd degree or ==> Euler path 0 vertices of odd degree...

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