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direct_sum.of_zero_ring_hom
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2021-04-14 18:40
src/algebra/direct_sum_graded.lean
feat(algebra/direct_sum_graded): `A 0` is a ring, `A i` is an `A 0`-module, and `direct_sum.of A 0` is a ring_hom (#6851) …
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direct_sum.of_zero_ring_hom
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