bicovering

Definition

• Let (X, τ, μ) be a bitopological space. If U_1 and U_2 are covering s of the spaces (X, τ), (X, μ) respectively, then the family U=U_1∪U_2 is called a bicovering of the space (X, τ, μ).

Reference

• Adnadjević, D.(Adnadzhevich, D.), Bicompactness of bitopological spaces., (English)[J] J. Sov. Math. 37, 1059-1063 (1987).