∫ Утверждение Mathlib
commSemigroup
Mathlib.Algebra.Group.TypeTags.Basic
URI: https://scilib.ai/kg/mathlib#Multiplicative.commSemigroup
∫ Утверждение Mathlib
Mathlib.Algebra.Group.TypeTags.Basic
URI: https://scilib.ai/kg/mathlib#Multiplicative.commSemigroup