*Definition [#g860d7a9]
-A topological space (X,τ) is called T_S-space if every [[s*g-closed>semi star generalized closed]] set is closed in X.

*Reference [#l7388759]
-Chandrasekhara Rao, K.; Narasimhan, D., ''T_S-spaces''. (English summary), Proc. Nat. Acad. Sci. India Sect. A 77 (2007), no. 4, 363-366.