(복소해석에서)
An open set that is connected is a
domain. //
열린집합,open_set 연결집합,connected_set
A
domain together with some, none or all of its boundary points is a region. //
경계점,boundary_point 영역,region(?? 둘 다 영역이라 하면 domain과 region의 번역이 겹치는데 한국어 책들을 봐야... 복소해석에서 domain과 region 번역 확실히)
A set that is formed by taking the union of a
domain and its boundary is a closed region. //
경계,boundary closed_region
(Chan Man Advanced Math)