semi-closure

Definition

• Let (X, τ) be a topological space. The semi-closure of B ⊆ X is the intersection of all semi-closed sets containing B.

Reference

• Bhattacharyya Paritosh, Lahiri B. K., Semigeneralized closed sets in topology., Indian J. Math. 29 (1987), no. 3, 375-382 (1988).