Theorem QuotientGroup.ker_le_range_iff

Modification history

2025-11-24 14:10
Mathlib/GroupTheory/QuotientGroup/Defs.lean
feat(Algebra): characterise when a quotient is nontrivial (#31198) …
Modified QuotientGroup.ker_le_range_iffView on Github →
2025-04-09 11:53
Mathlib/GroupTheory/QuotientGroup/Defs.lean
feat: generalize Mathlib.GroupTheory (#23192) …
Modified QuotientGroup.ker_le_range_iffView on Github →
2024-10-29 13:45
Mathlib/GroupTheory/QuotientGroup/Basic.lean
chore(GroupTheory/QuotientGroup): split off `Defs` file (#18348) …
Modified QuotientGroup.ker_le_range_iffView on Github →
2023-07-31 08:59
Mathlib/GroupTheory/QuotientGroup.lean
feat(Algebra/Category/GroupCat/Abelian): prove AddCommGroupCat is AB5 (#5597) …
Added QuotientGroup.ker_le_range_iffView on Github →