Theorem Nat.eight_dvd_sq_sub_one_of_odd

Modification history

2026-08-12 18:02
Mathlib/Algebra/Ring/Parity.lean
feat(Algebra/Ring/Int/Parity): add Int.sq_emod_four and relocate square-mod-four lemma (#42296) …
Modified Nat.eight_dvd_sq_sub_one_of_oddView on Github →
2025-09-01 18:54
Mathlib/NumberTheory/Multiplicity.lean
feat: `8 ∣ a ^ 2 - 1` for each odd `a` (#28790) …
Added Nat.eight_dvd_sq_sub_one_of_oddView on Github →