T_{1/2}

Definition

Property

• A space (X,τ) is T_{1/2} space if and only if it is a β*T_{1/2} and β**T_{1/2}[2]
• T_{1/2} ⇒ λ-T_{1/2}. [4]

Reference

1. .
2. Açıkgöz, Ahu, On β∗g-closed sets and new separation axioms. (English summary), Eur. J. Pure Appl. Math. 4 (2011), no. 1, 20–33.
3. Caldas Miguel, Jafari Saeid, Navalagi Govindappa, More on λ-closed sets in topological spaces.,Rev. Colombiana Mat. 41 (2007), no. 2, 355-369.