∫ Утверждение Mathlib
instRightCancelSemigroup
Mathlib.Algebra.Group.Opposite
URI: https://scilib.ai/kg/mathlib#MulOpposite.instRightCancelSemigroup
∫ Утверждение Mathlib
Mathlib.Algebra.Group.Opposite
URI: https://scilib.ai/kg/mathlib#MulOpposite.instRightCancelSemigroup