Results 11 to 20 of about 173,323,789 (179)

Real Interpolation and Measure of Weak Noncompactness [PDF]

open access: yesMathematische Nachrichten, 1995
AbstractBehavior of weak measures of noncompactness under real interpolation is investigated. It is shown that “convexity type” theorems hold true for weak measures of noncompactness.
Aksoy, A. G., Maligranda, Lech
openaire   +4 more sources

Some Properties of Measures of Noncompactness in Paranormed Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1988
This paper presents new properties of important measures of noncompactness in paranormed spaces. Using these properties some fixed point theorems for multivalued mappings in general topological vector spaces are obtained in a straightforward way.
Olga Hadžić, Hadžić, O.
openaire   +3 more sources

ON MEASURES OF NONCOMPACTNESS IN INEQUALITIES

open access: yesНаучный вестник МГТУ ГА, 2017
Measures of noncompactness are numerical characteristics of bounded subsets of metric space, equal to zero on relatively compact subsets. The quantitative characteristic of measure of noncompactness of metric space subset was introduced by K. Kuratovskiy
N. A. Erzakova
doaj   +1 more source

Existence of solutions for some classes of integro-differential equations via measure of noncompactness [PDF]

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2015
In this present paper, we introduce a new measure of noncompactness on the space consisting of all real functions which are $n$ times bounded and continuously differentiable on $\mathbb{R}_+$.
Reza Allahyari   +2 more
doaj   +3 more sources

Abstract random differential equations with state-dependent delay using measures of noncompactness [PDF]

open access: yesNonlinear Analysis
This paper is devoted to the existence of random mild solutions for a general class of second-order abstract random differential equations with state-dependent delay.
Amel Heris   +4 more
doaj   +2 more sources

Geometrical Coefficients and Measures of Noncompactness [PDF]

open access: yes, 1992
This thesis studies various measures of noncompactness and some geometrical coefficients in metric or Bauach spaces. These geometrical numbers are useful in the study of measures of noncompactness, some of which are interesting quantities in fixed point ...
Zhao, Weiyu
core   +4 more sources

On interpolation of the measure of noncompactness [PDF]

open access: yesProceedings of the Estonian Academy of Sciences. Physics. Mathematics, 2006
We revised the known results on interpolation of the measure of noncompactness and we announce a new approach to establishing the interpolation formula for the real method.
Fernando Cobos   +2 more
openaire   +2 more sources

Regular measures of noncompactness and Ascoli–Arzelà type compactness criteria in spaces of vector-valued functions [PDF]

open access: yes, 2023
In this paper we estimate the Kuratowski and the Hausdorff measures of noncompactness of bounded subsets of spaces of vector-valued bounded functions and of vector-valued bounded differentiable functions. To this end, we use a quantitative characteristic
Caponetti, D   +5 more
core   +1 more source

Compact matrix operators on a new sequence space related to ℓ p $\ell_{p}$ spaces

open access: yesJournal of Inequalities and Applications, 2016
In this paper, we derive some identities or estimates for the operator norms and the Hausdorff measures of noncompactness of certain matrix operators on the sequence space ℓ p ( r , s , t ; B ( m ) ) $\ell_{p}(r,s,t;B^{(m)})$ which is related to ℓ p ...
Abdullah Alotaibi   +2 more
doaj   +1 more source

Existence Results for Fractional Integral Equations in Frechet Spaces

open access: yesJournal of Mathematical Sciences and Modelling, 2022
The objective of this paper is to present results on the existence of solutions for a class of fractional integral equations in Fr\'{e}chet spaces of Banach space-valued functions on the unbounded interval.
Said Baghdad
doaj   +1 more source

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