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- W1857531058 abstract "We study the periodic and the Neumann boundary value problems associated with the second order nonlinear differential equation begin{equation*} u'' + c u' + lambda a(t) g(u) = 0, end{equation*} where $g colon mathopen{[}0,+inftymathclose{[}to mathopen{[}0,+inftymathclose{[}$ is a sublinear function at infinity having superlinear growth at zero. We prove the existence of two positive solutions when $int_{0}^{T} a(t) !dt 0$ is sufficiently large. Our approach is based on Mawhin's coincidence degree theory and index computations." @default.
- W1857531058 created "2016-06-24" @default.
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- W1857531058 date "2015-03-18" @default.
- W1857531058 modified "2023-10-01" @default.
- W1857531058 title "Pairs of positive periodic solutions of nonlinear ODEs with indefinite weight: a topological degree approach for the super-sublinear case" @default.
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