Positive solutions of a nonlinear three-point boundary value problem
Applied Mathematics and Computation
Multiple rositive solutions for a three-point boundary value problem
Mathematical and Computer Modelling: An International Journal
Existence of Positive Solutions for Multi-Point Boundary Value Problem with Strong Singularity
Acta Applicandae Mathematicae: an international survey journal on applying mathematics and mathematical applications
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This paper concerns the existence of nontrivial solutions for the following singular m-point boundary value problem with a sign-changing nonlinear term {(Lu)(t)+h(t)f(t,u)=0,0(-~,+~) is a sign-changing continuous function and may be unbounded from below. By applying the topological degree of a completely continuous field and the first eigenvalue and its corresponding eigenfunction of a special linear operator, some new results on the existence of nontrivial solutions for the above singular m-point boundary value problem are obtained. An example is then given to demonstrate the application of the main results. The work improves and generalizes the main results of [G. Han, Y. Wu, Nontrivial solutions of singular two-point boundary value problems with sign-changing nonlinear terms, J. Math. Anal. Appl. 325 (2007) 1327-1338; J. Sun, G. Zhang, Nontrivial solutions of singular superlinear Sturm-Liouville problem, J. Math. Anal. Appl. 313 (2006) 518-536].