Definition
- A bitopological space (X,τ_1,τ_2) is pairwise R_1 in the sense of Reilly (briefly R-p-R_1) if for each pair of points x, y of X such that there are an i-open set U and a j-open set C such that .
Definition
- Reilly I, L., On essentially pairwise Hausdorff spaces., Rend. Circ. Mat. Palermo (2) 25 (1976), No. 1-2, 47-52.