Last-modified: 2011-08-21 (日) 15:38:24
- A subset A of X is called γ-β-closed if its complement is γ-β-open.
- Basu, C. K.; Afsan, B. M. Uzzal; Ghosh, M. K., A class of functions and separation axioms with respect to an operation. (English summary), Hacet. J. Math. Stat. 38 (2009), no. 2, 103-118.