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Subgroup.index_le_of_leftCoset_cover_const
Modification history
2024-07-26 08:51
Mathlib/GroupTheory/CosetCover.lean
feat(GroupTheory): covering a group by cosets (Lemma of B. H. Neumann) (#13047) …
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Subgroup.index_le_of_leftCoset_cover_const
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