An erratum note on the paper: Positive periodic solution for Brillouin electron beam focusing system (Q379036)
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scientific article; zbMATH DE number 6226222
| Language | Label | Description | Also known as |
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| English | An erratum note on the paper: Positive periodic solution for Brillouin electron beam focusing system |
scientific article; zbMATH DE number 6226222 |
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An erratum note on the paper: Positive periodic solution for Brillouin electron beam focusing system (English)
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12 November 2013
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Liénard equation
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Brillouin electron beam focusing system
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periodic solution
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The authors point out an error in the paper [\textit{J. Ren}, \textit{Z. Cheng} and \textit{S. Siegmund}, Discrete Contin. Dyn. Syst., Ser. B 16, No. 1, 385--392 (2011; Zbl 1242.34072)]. As a consequence, the problem of the existence of a positive periodic solution to the Brillouin electron beam focusing system NEWLINE\[NEWLINEx''+ a(1+\cos 2t)x= x^{-1}NEWLINE\]NEWLINE for \(0< a< 1\) is still open.
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