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Theorem equiv.perm.sum_congr_hom.card_range

Modification history

2020-12-15 10:30
src/group_theory/perm/subgroup.lean
feat(group_theory/perm/basic): Bundle sigma_congr_right and sum_congr into monoid_homs (#5301) …
Added equiv.perm.sum_congr_hom.card_rangeView on Github →