isomorph: reduce size of CanonicalDigraph - #1209
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james-d-mitchell merged 1 commit intoAug 24, 2026
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This PR changes
CanonicalDigraphso that it has fewer vertices and edges, thereby improving the performance ofIsomorphismSemigroupsand friends.This change was developed with assistance from OpenAI’s Codex. The implementation, tests, and resulting behavior were reviewed by the author before submission.