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Published online by Cambridge University Press: 08 December 2010
We study the existence, multiplicity and non-existence of positive solutions for the singular two-point boundary-value problems
where λ is a non-negative real parameter and f ∈ C((0, 1) × [0,∞), (0,∞)). Here, f(t, u) may be singular at t = 0 and/or 1. To obtain the main results we use the global continuation theorem and fixed-point index theory.