λ-R_0

Definition

• A topological space (X, τ) is said to be a λ-R_0 space if every λ-open set contains the λ-closure of each of its singletons.

Property

Reference

• Caldas Miguel, Jafari Saeid, On some low separation axioms via λ-open and λ-closure operator., Rend. Circ. Mat. Palermo (2) 54 (2005), no. 2, 195–208.