Mathlib v3 is deprecated. Go to Mathlib v4

Def direct_sum.add_subgroup_is_internal

Modification history

2022-05-24 14:54
src/algebra/direct_sum/basic.lean
refactor(algebra/direct_sum/basic): use the new polymorphic subobject API (#14341) …
Deleted direct_sum.add_subgroup_is_internalView on Github →
2021-04-27 07:21
src/algebra/direct_sum.lean
feat(algebra/direct_sum): state what it means for a direct sum to be internal (#7190) …
Added direct_sum.add_subgroup_is_internalView on Github →