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Theorem direct_sum.ghas_mul.of_add_subgroups_mul

Modification history

2021-10-08 14:22
src/algebra/direct_sum/ring.lean
feat(algebra/graded_monoid): Split out graded monoids from graded rings (#9586) …
Deleted direct_sum.ghas_mul.of_add_subgroups_mulView on Github →
2021-05-01 06:41
src/algebra/direct_sum_graded.lean
fix(algebra/direct_sum_graded): replace badly-stated and slow `simps` lemmas with manual ones (#7403) …
Added direct_sum.ghas_mul.of_add_subgroups_mulView on Github →