# American Institute of Mathematical Sciences

2003, 2003(Special): 273-280. doi: 10.3934/proc.2003.2003.273

## Existence of solutions to second order problems with nonlinear boundary conditions

 1 Departamento de Matemática Aplicada, ETSI Industriales, UNED, Apartado de Correos 60149, Madrid, 28080, Spain 2 Department of Mathematics, National University of Ireland, Galway, Ireland

Received  September 2002 Published  April 2003

We prove several new existence results for second–order differential equations with nonlinear boundary value conditions including periodic, antiperiodic and Dirichlet data among others. New definitions of upper and lower solutions for our problems are presented and existence will be established via fixed point methods.
Citation: Daniel Franco, Donal O'Regan. Existence of solutions to second order problems with nonlinear boundary conditions. Conference Publications, 2003, 2003 (Special) : 273-280. doi: 10.3934/proc.2003.2003.273
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