Applicable Analysis and Discrete Mathematics 2012 Volume 6, Issue 2, Pages: 174-193
https://doi.org/10.2298/AADM120329010G
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Nonlocal systems of BVPS with asymptotically sublinear boundary conditions

Goodrich Christopher S. (Department of Mathematics, University of Nebraska-Lincoln, Lincoln, USA)

In this paper we consider a coupled system of second-order boundary value problems with nonlocal, nonlinear boundary conditions. By imposing only a condition of asymptotic sublinear growth on the nonlinear boundary functions, we are able to achieve generalizations over existing works and, in particular, we allow for the nonlocal terms to be able to be represented as Lebesgue-Stieltjes integrals possessing signed Borel measures. Because we only suppose the sublinearity of the nonlinear boundary functions at positive infinity, we also remove many of the restrictive growth assumptions found in other recent works on closely related problems. We conclude with a numerical example to explicate the consequences of our main result.

Keywords: Coupled system of second-order boundary value problems, nonlocal boundary condition, nonlinear boundary condition, eigenvalue, positive solution