Tietze extension theorem
preferred label: قضیه توسیع تیتز @fa
type: Concept
related: normal space

Urysohn lemma
preferred label: لم اوریسون @fa
type: Concept
broader: normal space

topological space
preferred label: فضای توپولوژیک @fa
type: Concept
narrower: normal space

closed extension topology
preferred label: توپولوژی توسیع بسته @fa
type: Concept
related: normal space

normal space
narrower: Urysohn lemma
related: closed extension topology
related: Tietze extension theorem
broader: topological space
preferred label: فضای نرمال @fa
type: Concept