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Theorem even.sub_even

Modification history

2022-04-06 12:59
src/algebra/parity.lean
feat(algebra/parity): introduce `is_square` and, via `to_additive`, also `even` (#13037) …
Deleted even.sub_evenView on Github →
2022-03-17 08:18
src/algebra/parity.lean
feat(algebra/parity + *): generalize lemmas about parity (#12761) …
Added even.sub_evenView on Github →