We revisit some results obtained by the authors together with Fabio Zanolin about the existence and multiplicity of positive solutions of boundary value problems associated with second-order equations of the type u′′ + q(t)g(u) = 0, where q is a sign-changing weight and g is a non-negative nonlinear function.
MULTIPLE POSITIVE SOLUTIONS FOR NONLINEAR PROBLEMS WITH INDEFINITE WEIGHT: AN OVERVIEW OF FABIO ZANOLIN’S CONTRIBUTIONS
Boscaggin A.;Feltrin G.
2023-01-01
Abstract
We revisit some results obtained by the authors together with Fabio Zanolin about the existence and multiplicity of positive solutions of boundary value problems associated with second-order equations of the type u′′ + q(t)g(u) = 0, where q is a sign-changing weight and g is a non-negative nonlinear function.
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