COMMUNICATIONS FACULTY OF SCIENCES UNIVERSITY OF ANKARA-SERIES A1 MATHEMATICS AND STATISTICS, cilt.67, sa.2, ss.306-316, 2018 (ESCI)
In this paper, we defined (F, h, alpha, mu)-psi-contractions using pair of (F, h) upper class functions for alpha-admissible and mu-subadmissible mappings. We proved some fixed point theorems for this type contractive mappings in b-metric spaces. Our results generalize alpha-admissible results in the literature.