Definition
- A subset A of X with an operation γ on τ is called γ-open if for each x ∈ A, there exists an open set U such that x ∈ U and .
Remark
Reference
- 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.