nishe

nishe: a canonical labeling package: Efficient isomorphism of Miyazaki graphs. .. We present a modification to the canonical-labeling algorithm used by nauty. We employ discovered automorphisms to ensure that a canonical labeling is determined in polynomial time for colored Miyazaki graphs. These automorphisms can be used to make better choices during the course of execution; so we use a guide tree to change the search depending on partial knowledge of the full automorphism group. The proposed modifications are not specific to Miyazaki graphs. Any graph with a nontrivial automorphism group can benefit from our approach.

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  1. Tener, Greg; Deo, Narsingh: Efficient isomorphism of Miyazaki graphs (2011)