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Commit 2020-09-26 15:49 31774933

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feat(ring_theory/algebra, algebra/module): Add add_comm_monoid_to_add_comm_group and semiring_to_ring (#4252)

Estimated changes

Modified src/algebra/module/basic.lean

added def semimodule.add_comm_monoid_to_add_comm_group

Modified src/linear_algebra/tensor_product.lean

Modified src/ring_theory/algebra.lean

modified theorem algebra.mul_sub_algebra_map_commutes

modified theorem algebra.mul_sub_algebra_map_pow_commutes

added def algebra.semiring_to_ring