Results 71 to 80 of about 173,323,789 (179)

On measure of noncompactness and application to global attractors of operator semigroups

open access: yes, 2021
Based on the recent development of the theory of measures of noncompactness, we rst show a representation theorem of measures of noncompactness dened on Banach spaces.
Zheng, Zheming   +4 more
core  

The Technique of Measures of Noncompactness in Banach Algebras and Its Applications to Integral Equations [PDF]

open access: yes, 2013
We study the solvability of some nonlinear functional integral equations in the Banach algebra of real functions defined, continuous, and bounded on the real half axis.
Józef Banaś, Szymon Dudek
core   +1 more source

Hausdorff Measure of Noncompactness of Matrix Mappings on Certain Difference Sequence Spaces

open access: yes, 2022
The well-known difference sequence spaces were introduced by Kızmaz [16] in 1981 and have been generalized by many authors uptill now. These spaces were extended for the first time by Sarıgöl [30] to the sequence spaces l∞(∆q), c(∆q) and c0(∆q).
Gökçe, Fadime, Fadime Gökçe
core   +1 more source

An Existence Result for Nonlocal Impulsive Second-Order Cauchy Problems with Finite Delay

open access: yesAbstract and Applied Analysis, 2013
We deal with the existence of mild solutions of a class of nonlocal impulsive second-order functional differential equations with finite delay in a real Banach space .
Fang Li, Huiwen Wang
doaj   +1 more source

Measures of noncompactness in Hilbert $C^*$-modules [PDF]

open access: yes
Consider a countably generated Hilbert $C^*$-module $\mathcal M$ over a $C^*$-algebra $\mathcal A$. There is a measure of noncompactness $λ$ defined, roughly as the distance from finitely generated projective submodules, which is independent of any ...
Kečkić, Dragoljub J., Lazović, Zlatko
core  

Hausdorff Measures of Noncompactness and Interpolation Spaces [PDF]

open access: yes, 2006
2000 Mathematics Subject Classification: 46B50, 46B70, 46G12.A new measure of noncompactness on Banach spaces is defined from the Hausdorff measure of noncompactness, giving a quantitative version of a classical result by R. S. Phillips.
da Silva, Eduardo Brandani   +1 more
core  

Existence of Solution to a Second-Order Boundary Value Problem via Noncompactness Measures

open access: yesDiscrete Dynamics in Nature and Society, 2012
The existence and uniqueness of the solutions to the Dirichlet boundary value problem in the Banach spaces is discussed by using the fixed point theory of condensing mapping, doing precise computation of measure of noncompactness, and calculating the ...
Wen-Xue Zhou, Jigen Peng
doaj   +1 more source

Convergence Theorems and Measures of Noncompactness for Noncompact Urysohn Operators in Ideal Spaces

open access: yesJournal of Integral Equations and Applications, 2004
The author considers the following nonlinear integral equation of Urysohn type \[ A(f)x(t):= \int_S f(t, s,x(s))\,ds,\quad t\in T, \] where the integral is in the Bochner sense. He establishes an estimate for the measure of noncompactness of the Urysohn operator and proves a convergence theorem for a sequence of simpler Urysohn operators which are ...
openaire   +2 more sources

Measures of noncompactness and asymptotic stability of solutions of a quadratic Hammerstein integral equation

open access: yes, 2011
In this paper we consider the existence of asymptotically stable solutions of a quadratic Hammerstein integral equation. This equation is investigated in the space of real functions defined, bounded and continuous on the real half-axis.
Ravi P. Agarwal   +5 more
core   +1 more source

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