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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Wenjie Gao, Junyu Wang (1995)
Annales Polonici Mathematici
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The periodic boundary value problem u''(t) = f(t,u(t),u'(t)) with u(0) = u(2π) and u'(0) = u'(2π) is studied using the generalized method of upper and lower solutions, where f is a Carathéodory function satisfying a Nagumo condition. The existence of solutions is obtained under suitable conditions on f. The results improve and generalize the work of M.-X. Wang et al. [5].
Lomtatidze, A., Malaguti, L. (2000)
Georgian Mathematical Journal
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Dong, Xin, Bai, Zhanbing (2008)
The Journal of Nonlinear Sciences and its Applications
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Gaprindashvili, G. (1995)
Georgian Mathematical Journal
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Dang Khanh Hoi (2006)
Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]
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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.
Hua, Jun, Moseley, James L. (2001)
Electronic Journal of Differential Equations (EJDE) [electronic only]
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Lavrent'ev, M.M.jun., Spigler, R., Akhmetov, D.R. (2001)
Sibirskij Matematicheskij Zhurnal
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J. C. Wilson (1994)
Acta Arithmetica
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Čomić, Irena, Stojanov, Jelena, Grujić, Gabrijela (2008)
Novi Sad Journal of Mathematics
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Maohua Le (1994)
Acta Arithmetica
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Xingbao Wu (1995)
Annales Polonici Mathematici
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A nonlinear differential equation of the form (q(x)k(x)u')' = F(x,u,u') arising in models of infiltration of water is considered, together with the corresponding differential equation with a positive parameter λ, (q(x)k(x)u')' = λF(x,u,u'). The theorems about existence, uniqueness, boundedness of solution and its dependence on the parameter are established.