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Structure subsemiring

Modification history

2021-06-07 15:40
src/ring_theory/subsemiring.lean
feat(algebra/ring/basic): define non-unital, non-associative rings (#6786) …
Modified subsemiringView on Github →
2020-05-29 06:50
src/ring_theory/subsemiring.lean
feat(ring_theory): define subsemirings (#2837) …
Added subsemiringView on Github →