∫ Утверждение Mathlib
instNonUnitalCommSemiringOfCommSemigroup
Mathlib.Data.Set.Semiring
URI: https://scilib.ai/kg/mathlib#SetSemiring.instNonUnitalCommSemiringOfCommSemigroup
∫ Утверждение Mathlib
Mathlib.Data.Set.Semiring
URI: https://scilib.ai/kg/mathlib#SetSemiring.instNonUnitalCommSemiringOfCommSemigroup