PORTUGALIAE MATHEMATICA Vol. 60, No. 3, pp. 253262 (2003) 

Positive Solutions for Semipositone (n,p) Boundary Value ProblemsXiaoming He and Weigao GeDepartment of Applied Mathematics, Beijing Institute of Technology,Beijing 100081  PEOPLE'S REPUBLIC OF CHINA Email: mingxiaohe@263.net Abstract: This paper is concerned with the existence of positive solutions to the $(n,p)$ boundary value problem $$ \begin{array}{ll} u^{(n)}+\lambda\, f(t,u)=0,& 0<t<1, Keywords: (n,p) boundary value problem; positive solution; Krasnosel'skii fixed point theorem. Classification (MSC2000): 34B15. Full text of the article:
Electronic version published on: 9 Feb 2006. This page was last modified: 27 Nov 2007.
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