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  • Article
    Citation - Scopus: 11
    Existence of Solutions of the Dynamic Cauchy Problem in Banach Spaces
    (Warsaw University, 2012) Cichon,M.; Kubiaczyk,I.; Sikorska-Nowak,A.; Yantir,A.
    In this paper we obtain the existence of solutions and Carathéodory type solutions of the dynamic Cauchy problem in Banach spaces for functions defined on time scales xδ(t) = f(t, x(t)), x(0) = x0, t 2 Ia, where f is continuous or f satisfies Carathéodory conditions and some conditions expressed in terms of measures of noncompactness. The Mönch fixed point theorem is used to prove the main result, which extends these obtained for real valued functions.
  • Article
    Citation - WoS: 1
    Some Fixed Point Results Via Measure of Noncompactness
    (int Scientific Research Publications, 2017) Chen, Chi-Ming; Karapinar, Erdal
    In this paper, by using the measure of noncompactness and Meir-Keeler type mappings, we prove some new fixed point theorems for some certain mappings, namely, the weaker phi-Meir-Keeler type contractions, asymptotic weaker phi-Meir-Keeler type contractions, asymptotic sequence {phi(i)}-Meir-Keeler type contraction, xi-generalized comparison type contraction, and R-functional type psi-contractions. Our results improve and hence cover the well-known Darbo's fixed point theorem, and several related recent fixed point results. (C) 2017 All rights reserved.