Positive solutions for Eigenvalue proble
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Qingliu Yao
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Article
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2004
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Elsevier Science
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English
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In this paper, we investigate the positive solutions of equations wc4)(t) = xf(t, w(t)) with w(O) = w(l) = w'(O) = w'(l) = 0. We obtain several existence and multiplicity results by an application of the Krasnosel'skii fixed-point theorem of cone expansion-compression type. This class of equations u