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Publication:2707289
zbMath0966.34060MaRDI QIDQ2707289
Publication date: 1 April 2001
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
existencefunctional-differential equationupper and lower solutionsperiodic boundary value problemupper and lower functionsLeray-Schauder degreeBorsuk antipodal theorem
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