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Theorem nonneg_and_nonneg_or_nonpos_and_nonpos_of_mul_nnonneg

Modification history

2020-10-03 20:51
src/algebra/ordered_ring.lean
feat(algebra/ordered*): more simp lemmas (#4359) …
Added nonneg_and_nonneg_or_nonpos_and_nonpos_of_mul_nnonnegView on Github →