Ćirić's fixed point theorem in a cone metric space.
Samet, Bessem (2010)
The Journal of Nonlinear Sciences and its Applications
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Samet, Bessem (2010)
The Journal of Nonlinear Sciences and its Applications
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Jleli, Mohamed, Samet, Bessem (2009)
The Journal of Nonlinear Sciences and its Applications
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J. O. Olaleru, G. A. Okeke, H. Akewe (2012)
Kragujevac Journal of Mathematics
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Aage, C.T., Salunke, J.N. (2011)
Annals of Functional Analysis (AFA) [electronic only]
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Dimitrios A. Kandilakis, Nikolaos S. Papageorgiou (1997)
Commentationes Mathematicae Universitatis Carolinae
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In this paper we examine periodic integrodifferential equations in Banach spaces. When the cone is regular, we prove two existence theorems for the extremal solutions in the order interval determined by an upper and a lower solution. Both theorems use only the order structure of the problem and no compactness condition is assumed. In the last section we ask the cone to be only normal but we impose a compactness condition using the ball measure of noncompactness. We obtain the extremal...
Beg, Ismat, Abbas, Mujahid, Nazir, Talat (2010)
The Journal of Nonlinear Sciences and its Applications
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Bauschke, Heinz H., Borwein, Jonathan M., Tseng, Paul (2000)
Journal of Convex Analysis
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Dušan Đukić, Ljiljana Paunović, Stojan Radenović (2011)
Kragujevac Journal of Mathematics
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Chabi, El Hassan, Zouaki, Hamid (2000)
Journal of Convex Analysis
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Anderson, Douglas R., Avery, Richard I., Henderson, Johnny, Liu, Xueyan (2011)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Mikhail Krastanov (1995)
Banach Center Publications
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The property of forward invariance of a subset of with respect to a differential inclusion is characterized by using the notion of a perpendicular to a set. The obtained results are applied for investigating the dependence of the small-time local controllability of a homogeneous control system on parameters.