gs-open

定義

In topological spaces, a subset A is called gs-open (generalized semiopen) if for every closed set F, the semiinterior of A contains F whenever A contains F.

参考

R. Devi, K. Balachandran and H. Maki, Semigeneralized closed and generalized closed maps, Mem. Fac. Sci. Kochi Univ. Ser.A (Maths), 14 (1993), 41-54.