한국수학교육학회지시리즈B:순수및응용수학 (The Pure and Applied Mathematics)
- 제5권1호
- /
- Pages.1-3
- /
- 1998
- /
- 1226-0657(pISSN)
- /
- 2287-6081(eISSN)
A NOTE ON QUASI-OPEN MAPS
초록
Let f : X longrightarrow Y be quasi-open. We show that: (1) If A
Let f : X longrightarrow Y be quasi-open. We show that: (1) If A