mathlib
bb168510 - feat(algebra/ne_zero): generalize lemmas (#17477)

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3 years ago
feat(algebra/ne_zero): generalize lemmas (#17477) Lemmas with reduced typeclass assumptions: `zero_ne_one` `one_ne_zero` `two_ne_zero` `three_ne_zero` `four_ne_zero` `ne_zero_of_eq_one` Removed lemmas: `is_R_or_C.two_ne_zero` `two_ne_zero'` New explicit version lemmas: `zero_ne_one'` `one_ne_zero'` `two_ne_zero'` `three_ne_zero'` `four_ne_zero'` Renamed lemma: `ne_zero.ne'` -> `ne_zero.nat_cast_ne` New lemma: `ne_zero.ne'` Most of other diffs are just simply replace `@lemma` with new explicit lemmas mathlib4: https://github.com/leanprover-community/mathlib4/pull/577
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