Ordinary differential equations with nonlinear boundary conditions.
Jankowski, Tadeusz (2002)
Georgian Mathematical Journal
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Jankowski, Tadeusz (2002)
Georgian Mathematical Journal
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Ming-Xing Wang, Alberto Cabada, Juan J. Nieto (1993)
Annales Polonici Mathematici
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The purpose of this paper is to study the periodic boundary value problem -u''(t) = f(t,u(t),u'(t)), u(0) = u(2π), u'(0) = u'(2π) when f satisfies the Carathéodory conditions. We show that a generalized upper and lower solution method is still valid, and develop a monotone iterative technique for finding minimal and maximal solutions.
Agarwal, Ravi P., O'Regan, Donal (2001)
Georgian Mathematical Journal
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Dong, Xin, Bai, Zhanbing (2008)
The Journal of Nonlinear Sciences and its Applications
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Gerd Herzog, Roland Lemmert (2003)
Extracta Mathematicae
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Gaprindashvili, G. (1995)
Georgian Mathematical Journal
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Lomtatidze, A., Malaguti, L. (2000)
Georgian Mathematical Journal
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Ashordia, M. (1996)
Georgian Mathematical Journal
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Svatoslav Staněk (1993)
Annales Polonici Mathematici
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A differential equation of the form (q(t)k(u)u')' = F(t,u)u' is considered and solutions u with u(0) = 0 are studied on the halfline [0,∞). Theorems about the existence, uniqueness, boundedness and dependence of solutions on a parameter are given.
Lomtatidze, A. (1994)
Georgian Mathematical Journal
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Kulpeshov, B.Sh. (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Stepanov, V.N. (2005)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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Gerd Herzog (1998)
Colloquium Mathematicae
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We prove that the initial value problem x’(t) = f(t,x(t)), is uniquely solvable in certain ordered Banach spaces if f is quasimonotone increasing with respect to x and f satisfies a one-sided Lipschitz condition with respect to a certain convex functional.