Last-modified: 2012-02-13 (月) 18:11:05
- Let (X, T , E) be a soft space over X, then the members of T are said to be soft open sets in X.
- Shabir Muhammad, Naz Munazza, On soft topological spaces. (English summary), Comput. Math. Appl. 61 (2011), no. 7, 1786-1799.