Results 31 to 40 of about 194,262,804 (90)
Spectral radius of S-essential spectra
Математичні Студії, 2020 In this paper, we study the spectral radius of some S-essential spectra of a bounded linear operator defined on a Banach space. More precisely, via the concept of measure of noncompactness,we show that for any two bounded linear operators $T$ and $S ...
C. Belabbaci
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The 𝑒-positive mild solutions for fractional impulsive evolution equations with 1 < 𝛼 < 2
CQD Revista Eletrônica Paulista de Matemática, 2022 In this paper, we investigate the existence of global 𝑒-positive mild solutions for impulsive evolution fractional differential equation in the Caputo sense of order 1 < 𝛼 < 2.
Jorge Féres Junior +2 more
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Generalized fractals in semimetric spaces [PDF]
, 2022 The aim of the present paper is to extend the classical fractal theory using condensing maps and generalized contractions of semimetric spaces.
Pénzes, Evelin, Bessenyei, Mihály
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Second Order Semilinear Volterra-Type Integro-Differential Equations with Non-Instantaneous Impulses
Mathematics, 2019 We consider a non-instantaneous system represented by a second order nonlinear differential equation in a Banach space E. We use the family of linear bounded operators introduced by Kozak, Darbo fixed point method and Kuratowski measure of noncompactness.
Mouffak Benchohra +3 more
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ON KURATOWSKI MEASURE OF NONCOMPACTNESS IN R 2 WITH THE RIVER METRIC
, 2020 In this paper we onsider some properties of the Kuratowski measure of noncompatness on the space (R2 , d* ), where d* is river metric. We prove the existence of the α-minimal sets in the given space, but also the strict minimalizability of the Kuratowski
Reki¢-Vukovi¢, Amra, OKICIC, NERMIN
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Journal of Function Spaces, Volume 2026, Issue 1, 2026.This work is devoted to the study of a nonlinear tripled system of Langevin‐type fractional differential equations involving generalized ψ‐Caputo derivatives in the setting of Banach spaces. The proposed framework extends several existing results from finite‐dimensional and specialized functional spaces to more general infinite‐dimensional environments.
Hasanen A. Hammad +2 more
wiley +1 more source
Journal of Function Spaces, Volume 2026, Issue 1, 2026.In this paper, the existence of mild solutions for a class of noninstantaneous impulsive Caputo fractional integro‐differential equations subject to nonlocal conditions in Banach spaces is investigated. The problem is formulated in a general infinite‐dimensional setting so that systems involving memory effects and impulses acting over finite intervals ...
Hasanen A. Hammad +2 more
wiley +1 more source
Journal of Function Spaces, Volume 2026, Issue 1, 2026.This paper is devoted to the analysis of controllability for a class of backward fractional integro‐differential equations involving history‐dependent operators, which arise naturally in systems with memory effects. The study begins with the formulation of an appropriate functional framework, within which the concept of approximate controllability is ...
Ghadah Albeladi +2 more
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Journal of Function Spaces, Volume 2026, Issue 1, 2026.This work introduces an innovative analytical framework for studying finite systems of nonlinear tripled‐variable fractional singular Volterra integral equations in the Banach space. The investigation combines the technique of measures of noncompactness with fixed point theorem to establish new solvability criteria for highly nonlinear finite ...
Hasanen A. Hammad +2 more
wiley +1 more source
Journal of Function Spaces, Volume 2026, Issue 1, 2026.This paper investigates the existence of mild solutions and optimal controls for a class of second‐order delayed neutral nonautonomous evolution systems involving hemivariational inequalities, history‐dependent operators, and Clarke′s generalized subdifferential in Hilbert spaces. The novelty of the proposed framework lies in the simultaneous treatment
Hasanen A. Hammad +3 more
wiley +1 more source