*Definition [#x51f7f37]
-A bitopological space (X,τ,μ) is pairwise T_3 if it is [[pairwise regular]] and [[pairwise T_1]].

*Property [#zde65a44]
-pairwise T_3 implies [[pairwise T_2]]


*Reference [#s498ac16]
-Reilly, Ivan L.,''On bitopological separation properties.'',Nanta Math. 5 (1972), no. 2, 14–25