Existence of solutions to second order problems with nonlinear boundary conditions (Q1422517)

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scientific article; zbMATH DE number 2046192
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Existence of solutions to second order problems with nonlinear boundary conditions
scientific article; zbMATH DE number 2046192

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    Existence of solutions to second order problems with nonlinear boundary conditions (English)
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    23 February 2004
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    An upper and lower solutions method is developed for scalar second-order ordinary differential equations subject to general nonlinear boundary conditions. A new definition of coupled upper and lower solutions is introduced. This allows a unified treatment of several problems.
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    nonlinear ordinary differential equation
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    nonlinear boundary condition
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    upper and lower solution
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    Nagumo condition
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