Definition
- A topological space (X, τ) is said to be λ-R_1 if for x, y in X with is a subset of U and is a subset of V.
Remark
- See λ-closure.
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.