International Journal of Engineering and Information Systems (IJEAIS)   Year: 2021 | Volume: 5 | Issue: 1 | Page No.: 145-152 Bipolar hyper Fuzzy AT-ideals of AT-Algebra Dr. Areej Tawfeeq Hameed, Rusul Ahmed Flayyih and Saba Hussein Ali Abstract: In this paper, using the notion of bipolar-valued fuzzy set, we establish the bipolar fuzzification the notion of (strong, weak) hyper AT-ideals in hyper AT-algebras, and investigate some of their properties.