Your question is far too vague.

Go have a look at the Graph module. You can just define your own comparison by overloading the eq member of that class.

As for ranking nodes: you need to define a criteria first. Most likely you'll find what you need in that module.

In reply to Re: How to compare two undirected graphs? by juampatronics
in thread How to compare two undirected graphs? by Anonymous Monk

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