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Theorem equiv.perm.sigma_congr_right_inv

Modification history

2020-12-15 10:30
src/group_theory/perm/basic.lean
feat(group_theory/perm/basic): Bundle sigma_congr_right and sum_congr into monoid_homs (#5301) …
Modified equiv.perm.sigma_congr_right_invView on Github →
2020-12-08 10:43
src/group_theory/perm/basic.lean
chore(group_theory/perm): Add alternate formulation of (sum|sigma)_congr lemmas (#5260) …
Added equiv.perm.sigma_congr_right_invView on Github →