ArticleOriginal scientific text
Title
Positive solutions to nonlinear singular second order boundary value problems
Authors 1
Affiliations
- Dipartimento di Ingegneria Elettronica e Matematica Applicata, Università di Reggio Calabria, via E. Cuzzocrea 48, 89128 Reggio Calabria, Italy
Abstract
Existence theorems of positive solutions to a class of singular second order boundary value problems of the form y'' + f(x,y,y') = 0, 0 < x < 1, are established. It is not required that the function (x,y,z) → f(x,y,z) be nonincreasing in y and/or z, as is generally assumed. However, when (x,y,z) → f(x,y,z) is nonincreasing in y and z, some of O'Regan's results [J. Differential Equations 84 (1990), 228-251] are improved. The proofs of the main theorems are based on a fixed point theorem for weakly sequentially continuous operators.
Keywords
singular boundary value problem, positive solution
Bibliography
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Pages:
237-251
Main language of publication
English
Received
1995-05-27
Published
1996
Exact and natural sciences