Results 141 to 150 of about 1,488 (168)
Some of the next articles are maybe not open access.
The measure of noncompactness of Sobolev embeddings
Integral Equations and Operator Theory, 1994The author gives new formulas for the upper \(q\)-norm of the embedding \(I: W^ k_ p(Q)\to L_ q(Q)\) \((Q\subset \mathbb{R}^ n)\). She also proves necessary and sufficient conditions for a bounded linear operator to be semi-Fredholm.
openaire +2 more sources
Minimal Sets for a Measure of Noncompactness
1997The notion of a o-minimal set for an MNC o was introduced in [Do1] in order to study the relationships between condensing mappings for Kuratowski and Haus-dorff’s measures of noncompactness (see Chapter X).
J. M. Ayerbe Toledano +2 more
openaire +1 more source
Impulsive integrodifferential Equations and Measure of noncompactness
2016This paper is concerned with the existence of mild solutions for impulsive integro-differential equations with nonlocal conditions. We apply the technique measure of noncompactness in the space of piecewise continuous functions and by using Darbo-Sadovskii's fixed point theorem, we prove reasults about impulsive integro-differential equations for ...
Valipour Baboli, Alireza, Ghaemi, M.B.
openaire +1 more source
On Some Results Using Measures of Noncompactness
2017In this chapter, we review some results on measures of noncompactness, including an axiomatic introduction, a study of the Kuratowski, Hausdorff, inner Hausdorff and separation measures of noncompactness, a survey of their most important properties and their roles in fixed-point theory and operator theory.
Eberhard Malkowsky, Vladimir Rakočević
openaire +1 more source
Theorems of ascoli type involving measures of noncompactness
Nonlinear Analysis: Theory, Methods & Applications, 1981openaire +2 more sources