∫ Утверждение Mathlib
instDecidablePredIsSquare
Mathlib.Algebra.Group.Even
URI: https://scilib.ai/kg/mathlib#Multiplicative.instDecidablePredIsSquare
∫ Утверждение Mathlib
Mathlib.Algebra.Group.Even
URI: https://scilib.ai/kg/mathlib#Multiplicative.instDecidablePredIsSquare