Theorem Con.ker_apply_eq_preimage

Modification history

2023-07-26 09:26
Mathlib/GroupTheory/Congruence.lean
chore: fix some `Set` defeq abuse, golf (#6114) …
Deleted Con.ker_apply_eq_preimageView on Github →
2023-01-17 13:16
Mathlib/GroupTheory/Congruence.lean
feat: port GroupTheory/Congruence (#1316) …
Added Con.ker_apply_eq_preimageView on Github →