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Theorem direct_sum.add_subgroup_is_internal.to_add_submonoid

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_internal.to_add_submonoidView 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_internal.to_add_submonoidView on Github →