Johnson O. Olaleru | Searcharxiv

arXiv2023

Fixed points of generalized contractions on O-metric spaces

The class of O-metric spaces generalize several existing metric-types in literature including metric spaces, b-metric spaces, and ultra metric spaces. In this paper, we discuss the properties of the topology induced by an O-metric and establish in the setting, fixed point theorems of contractions and generalized contractions. The proofs of the theorems rely heavily on polygon O-inequalities which are a natural generalization of the triangle inequality, and the construction of which leads to the notion of O-series following a pattern of functions.

math.GM↗

arXiv2022

A generalized metric-type structure with some applications

The paper introduces the class of O-metric spaces, a novel generalization of metric-type spaces, classifying almost all possible metric types into upward and downward O-metrics. We list some topologies arising from O-metrics and discuss convergence, sequential continuity, first countability and T$_2$ separation. The topology of an O-metric space can be generated by an upward O-metric on the space hence the focus on upward O-metric spaces. A theorem on the existence and uniqueness of a fixed point of some contractive-like map is proved and related with some other well known fixed point results in literature. Applications to the estimation of distances, polygon inequalities, and optimization of entries in infinite symmetric matrices are also given.

math.GM↗