Geodesic
Wirtinger inequality and nonlinear differential systems
Archivum mathematicum, Tome 49 (2013) no. 1, pp. 35-41.

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Picone identity for a class of nonlinear differential equations is established and various qualitative results (such as Wirtinger-type inequality and the existence of zeros of first components of solutions) are obtained with the help of this new formula.
DOI : 10.5817/AM2013-1-35
Classification : 34A05, 34C10
Keywords: nonlinear differential system; Picone identity; Wirtinger inequality 
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Jaroš, Jaroslav. Wirtinger inequality and nonlinear differential systems. Archivum mathematicum, Tome 49 (2013) no. 1, pp. 35-41. doi : 10.5817/AM2013-1-35. http://geodesic.mathdoc.fr/articles/10.5817/AM2013-1-35/

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