By means of the fixed point theory in cones, we investigate the existence of positive solutions for the following second-order singular differential equations with a negatively perturbed term: , , , where is a parameter; is continuous; may be singular at , and , and the perturbed term is Lebesgue integrable and may have finitely many singularities in , which implies that the nonlinear term may change sign.
"Positive Solutions for Second-Order Singular Semipositone Differential Equations Involving Stieltjes Integral Conditions." Abstr. Appl. Anal. 2012 (SI11) 1 - 21, 2012. https://doi.org/10.1155/2012/696283