∫ Утверждение Mathlib
closure_singleton_zero
Mathlib.Algebra.Group.Submonoid.Membership
URI: https://scilib.ai/kg/mathlib#AddSubmonoid.closure_singleton_zero
∫ Утверждение Mathlib
Mathlib.Algebra.Group.Submonoid.Membership
URI: https://scilib.ai/kg/mathlib#AddSubmonoid.closure_singleton_zero