Abstract
We consider the existence of positive solutions of the singular nonlinear semipositone problem of the form
where Ω is a bounded smooth domain of ℝN with 0 ∈ Ω, 1 < p < N, 0 ⩽ α < (N − p)/p, γ ∈ (0, 1), and a, β, c and λ are positive parameters. Here f: [0,∞) → ℝ is a continuous function. This model arises in the studies of population biology of one species with u representing the concentration of the species. We discuss the existence of a positive solution when f satisfies certain additional conditions. We use the method of sub-supersolutions to establish our results.
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Rasouli, S.H. A population biological model with a singular nonlinearity. Appl Math 59, 257–264 (2014). https://doi.org/10.1007/s10492-014-0053-7
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DOI: https://doi.org/10.1007/s10492-014-0053-7