Document Type

Article

Publication Title

Journal of Integral Equations and Applications

Abstract

We consider the following systems of Fredholm integral equations and the system of Volterra integral equations where the nonlinearities fi, 1 ≤ i ≤ n may be singular in the independent variable and may also be singular at uj = 0, j ∈ {1, 2,..., n}. Our aim is to establish criteria such that the above systems have at least one constant-sign solution (u1, u2,..., un), i.e., for each 1 ≤ i ≤ n, Θiui ≥ 0 where Θi ∈ {1,-1} is fixed. © 2007 Rocky Mountain Mathematics Consortium.

First Page

117

Last Page

142

DOI

10.1216/jiea/1182525211

Publication Date

6-22-2007

Included in

Mathematics Commons

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