Definition
- The τ_γ-interior of subset A of X with an operation γ on τ is denoted by τ_γ-int(A) and defined to be the union of all γ-open sets of X contained in A.
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.