On β –I- Continuous Mappings in Ideal Bitopological Spaces

The notion of ideal topological introduced and studied by Kuratowski ,in 1992,Jankovic and Hamlett[ 8] introduced the concept of I-open sets in topological spaces ,Abd EL-Monsef et al.[ 1] further investigated I-open sets and I-continuity in 1999, Abd EL-Monsef et al. introduced the notion of almost-I-open sets and almost-I-continuity, Hatir and Noiri[ 6] have introduced the notion of β – I- open sets Recently, M. Galdas, S. Jafari and N. Rajesh[ 4] introduced the notion of pre-I-open sets in ideal bitopological space, Hatir and Noiri[ 6] have introduced the notion of these functions .