*Definition [#t46888ff]
-A bitopological space (X,τ,μ) is pairwise T_2 if for each pair of distinct points x and y of X there is a τ open set U and a μ open set V such that &ref(http://www.eaflux.com/imgtex/imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20x%5cin%20U%2c%20y%5cin%20V%20%5c%5d%7d%25.png); and U and V are disjoint.

*Property [#s1a2af4a]
-pairwise T_2 implies [[R-p-T_1>pairwise T_1 in the sense of Reilly]]

*Remark [#ya092d18]
-[[pairwise Hausdorff]]とも云う。

*Reference [#q406fb02]
-Reilly, Ivan L.,''On bitopological separation properties.'',Nanta Math. 5 (1972), no. 2, 14–25.