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Nonlinear Analysis
Article . 2008 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 2008
Data sources: zbMATH Open
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Leggett–Williams theorems for coincidences of multivalued operators

Leggett--Williams theorems for coincidences of multivalued operators
Authors: O'Regan, Donal; Zima, Mirosława;

Leggett–Williams theorems for coincidences of multivalued operators

Abstract

Let \(X,Y\) be Banach spaces, \(C\) be a cone in \(X\) and let \(\Omega_1,\Omega_2\) be open bounded subsets of \(X\) with \(\overline{\Omega}_1\subset\Omega_2\). For a pair \((L,N)\) consisting of a linear Fredholm operator \(L:\text{dom}\,L\subset X\to Y\) of zero index and an upper semicontinuous (compact convex)-valued multimap \(N:X\multimap Y\), the authors study the existence of a coincidence point \((Lx \in Nx)\) in \(C\cap(\overline{\Omega}_2\setminus\Omega_1)\). They use topological degree methods under some compactness or condensivity conditions. As application, the existence of positive periodic solutions for a differential inclusion is considered.

Keywords

Degree theory for nonlinear operators, Fixed-point and coincidence theorems (topological aspects), multivalued map, periodic solution, Fredholm operator, Fixed-point theorems, coincidence point, fixed point, positive solution, differential inclusion, Periodic solutions to ordinary differential equations, Set-valued operators, topological degree, Ordinary differential inclusions

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
9
Average
Top 10%
Average
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