On the Correlation between Banach Contraction Principle and Caristi¿s Fixed Point Theorem in b-Metric Spaces

[EN] We solve a question posed by E. Karapinar, F. Khojasteh and Z.D. Mitrovic in their paper "A Proposal for Revisiting Banach and Caristi Type Theorems in b-Metric Spaces". We also characterize the completeness of b-metric spaces with the help of a variant of the contractivity condition introduced by the authors in the aforementioned article.