ZMod.neg_eq_self_iff

∀ {n : ℕ} (a : ZMod n), -a = a ↔ a = 0 ∨ 2 * a.val = n

Defined in: Mathlib.Data.ZMod.Basic
Cited by: 1 results in Mathlib
Foundations: Depth 63 from the axioms · uses propext, Classical.choice, Quot.sound

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