Last-modified: 2010-11-26 (金) 16:37:43
- A topological space (X,τ) is said to be α-T_0 if for any distinct pair of points in X, there is an α-open? set containing one of the points but not the other.
- Caldas, M.; Georgiou, D. N.; Jafari, S. , Characterizations of low separation axioms via α-open sets and α-closure operator., (English summary) Bol. Soc. Parana. Mat. (3) 21 (2003), no. 1-2, 97–111.