∫ Утверждение Mathlib
instNonUnitalCommSemiring
Mathlib.Algebra.Ring.Opposite
URI: https://scilib.ai/kg/mathlib#AddOpposite.instNonUnitalCommSemiring
∫ Утверждение Mathlib
Mathlib.Algebra.Ring.Opposite
URI: https://scilib.ai/kg/mathlib#AddOpposite.instNonUnitalCommSemiring