• + 2 comments

    The first diagram in the description is incorrect. There are 2 nodes labelled 13. I was confused why they have 15 nodes and 15 edges. So actually they have 16 nodes and 15 edges.

    I'm going with this definition of graph isomorphism: "an isomorphism is a vertex bijection which is both edge-preserving and label-preserving"

    Essentially given 2 graphs A and B. If all the labelled nodes in A is equal to B and all edges in A are same as all edges in B.