Λ^s_δ-set
Last-modified: 2011-04-16 (土) 19:45:23
Definition
- Let A be a subset of a topological space (X,τ). By
we denote the set
, where δSO(X,τ) is the collection of all δ-semiopen sets. The subset A of X is called δ-Λ_s-semiclosed, denoted by Λ^s_δ-set, if
.
Reference
- Caldas, M.; Ganster, M.; Georgiou, D. N.; Jafari, S.; Moshokoa, S. P., δ-semiopen sets in topology. (English summary), Proceedings of the 19th Summer Conference on Topology and its Applications., Topology Proc. 29 (2005), no. 2, 369–383.