region
preferred label: ناحیه @fa
type: Concept
narrower: regular region

regular region
related: second extension principle
related: regular surface
broader: region
preferred label: ناحیه منظم @fa
type: Concept

regular surface
preferred label: رویه منظم @fa
type: Concept
related: regular region

second extension principle
preferred label: اصل دوم توسیع @fa
type: Concept
related: regular region