*Definition [#g699f94f]
-Let  (X, τ) be a topological space. The semi-closure of B ⊆ X is the intersection of all [[semi-closed sets>semi-closed]] containing B.


*Reference [#l78e82fc]
-Bhattacharyya Paritosh, Lahiri B. K., ''Semigeneralized closed sets in topology.'', Indian J. Math. 29 (1987), no. 3, 375-382 (1988).