∫ Утверждение Mathlib
neg_equiv_self
Mathlib.SetTheory.Game.Impartial
URI: https://scilib.ai/kg/mathlib#SetTheory.PGame.Impartial.neg_equiv_self
∫ Утверждение Mathlib
Mathlib.SetTheory.Game.Impartial
URI: https://scilib.ai/kg/mathlib#SetTheory.PGame.Impartial.neg_equiv_self