τ_γ-closure

Defenition

• The τ_γ-closure of a subset A of X with an operation γ on τ is denoted by τ_γ-cl(A) and is defined to be the intersection of all γ-closed sets containing 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.