Last-modified: 2011-11-11 (金) 18:14:27
- A function f:X → Y is said to be pre-semi-closed if the image of every semiclosed? subset of X is semiclosed? in Y.
- Arya, S.P.; Nour, T.M., Weakly semi-R_0 spaces., (English) [J] Indian J. Pure Appl. Math. 21, No.12, 1083-1085 (1990).