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Jleli, M., Karapinar, E., O’Regan, D. and Samet, B. (2016) Some Generalizations of Darbo’s Theorem and Applications to Fractional Integral Equations. Fixed Point Theory and Applications, 2016, Article No. 11.
https://doi.org/10.1186/s13663-016-0497-4

has been cited by the following article:

• TITLE: Existence of Solutions of a Convolution Integral Equation

  AUTHORS: Henry Otoo, Benjamin Dadzie Mensah, Lewis Brew

  KEYWORDS: Volterra, Integral Equation, Convolution, Fixed Point, Existence, Noncompactness

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.12 No.5, May 30, 2024

  ABSTRACT: In this study, we prove the of existence of solutions of a convolution Volterra integral equation in the space of the Lebesgue integrable function on the set of positive real numbers and with the standard norm defined on it. An operator P was assigned to the convolution integral operator which was later expressed in terms of the superposition operator and the nonlinear operator. Given a ball Br belonging to the space L it was established that the operator P maps the ball into itself. The Hausdorff measure of noncompactness was then applied by first proving that given a set M∈ B r the set is bounded, closed, convex and nondecreasing. Finally, the Darbo fixed point theorem was applied on the measure obtained from the set E belonging to M. From this application, it was observed that the conditions for the Darbo fixed point theorem was satisfied. This indicated the presence of at least a fixed point for the integral equation which thereby implying the existence of solutions for the integral equation.