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Existence theorems on the Dirichlet problem for the equation Δu + f(x, u)=0

Published online by Cambridge University Press:  20 January 2009

Gabriele Bonanno
Gabriele Bonanno
Affiliation:
Istituto Di Matematica, Universitá di Reggio Calabria Via E. Cuzzocrea, 48 89128 Reggio Calabria, Italy
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Abstract

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In this note we consider the Dirichlet problem Δu + f(x, u)=0 in Ω, u = 0 on ∂Ω here Ω is a bounded domain in ℝn(n≧3), with smooth boundary ∂Ω. We prove the existence of strong solutions to the previous problem, which are positive if f satisfies a suitable condition. As a consequence we find that the problem with , may have positive solutions even if g is not a lower-order perturbation of Next We examine the case .

Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 39 , Issue 1 , February 1996 , pp. 31 - 36
Copyright
Copyright © Edinburgh Mathematical Society 1996

References

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