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On Dirichlet problems with singular nonlinearity of indefinite sign
(2015)
Let Ω be a smooth bounded domain in RN , N ≥ 1, let K, M be two nonnegative functions and let α, γ > 0. We study existence and nonexistence of positive solutions for singular problems of the form −Δu = K(x)u−α − λM (x)u−γ ...
Existence of strictly positive solutions for sublinear elliptic problems in bounded domains
(2014)
Let Ω be a smooth bounded domain in RN and let m be a possibly discontinuous and
unbounded function that changes sign in Ω. Let f : [0,∞) → [0,∞) be a nondecreasing
continuous function such that k1 ξp ≤ f (ξ) ≤ k2 ξp for ...