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On the Solvability of a Neumann Boundary Value Problem at Resonance

Published online by Cambridge University Press:  20 November 2018

Chung-Cheng Kuo*
Affiliation:
Department of Mathematics, Fu Jen University, Taipei, Taiwan
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Abstract

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We study the existence of solutions of the semilinear equations (1) in which the non-linearity g may grow superlinearly in u in one of directions u → ∞ and u → −∞, and (2) −Δu + g(x, u) = h, in which the nonlinear term g may grow superlinearly in u as |u| → ∞. The purpose of this paper is to obtain solvability theorems for (1) and (2) when the Landesman-Lazer condition does not hold. More precisely, we require that h may satisfy are arbitrarily nonnegative constants, . The proofs are based upon degree theoretic arguments.

Type
Research Article
Copyright
Copyright © Canadian Mathematical Society 1997

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