∫ Утверждение Mathlib
not_firstCountableTopology_opc
Mathlib.Topology.Instances.RatLemmas
URI: https://scilib.ai/kg/mathlib#Rat.not_firstCountableTopology_opc
∫ Утверждение Mathlib
Mathlib.Topology.Instances.RatLemmas
URI: https://scilib.ai/kg/mathlib#Rat.not_firstCountableTopology_opc