Electronic Journal of Differential Equations,
Vol. 2006(2006), No. 11, pp. 1-10.

Title: On a variational approach to existence and multiplicity results
       for semipositone problems
       
Authors: David G. Costa (Univ. of Nevada, Las Vegas, NV, USA)
         Hossein Tehrani (Univ. of Nevada, Las Vegas, NV, USA)
	 Jianfu Yang (Chinese Academy of Sciences, Wuhan, China)

Abstract: 
 In this paper we present a novel variational approach to the
 question of existence and multiplicity of positive solutions to
 semipositone problems in a bounded smooth domain of
 $\mathbb{R}^N$. We consider both the sublinear and superlinear
 cases.
 
Submitted June 15, 2005. Published January 24, 2006.
Math Subject Classifications: 46E35, 46E39, 35J55.
Key Words: Variational approach; semipositone problems.