In this paper, we prove some fixed point theorems under generalized $(\epsilon-\delta)$ type rational contractions in which the fixed point may be a point of discontinuity. Our results generalize and improve a host of well-known fixed point theorems existing in the literature. In addition to it we give a fixed point theorem for $(\epsilon-\delta)$ non-expansive mappings in metric spaces. Several examples are given to illustrate our results.
"$(\epsilon-\delta)$ conditions and fixed point theorems." Tbilisi Math. J. 12 (3) 39 - 49, July 2019. https://doi.org/10.32513/tbilisi/1569463233