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Obere Schranken für die Eigenwerte einer stückweise freien Membran auf einem «Vierseit»

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Summary

Using Poincaré's principle and the harmonic transplantation [3], upper bounds for the partially free membranes are constructed. The bounds for the first eigenvalue are isoperimetric; the extremal domain is the rectangle. Extensions to more general eigenvalue problems are indicated.

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Literatur

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Bandle, C. Obere Schranken für die Eigenwerte einer stückweise freien Membran auf einem «Vierseit». Journal of Applied Mathematics and Physics (ZAMP) 21, 1072–1077 (1970). https://doi.org/10.1007/BF01594863

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  • DOI: https://doi.org/10.1007/BF01594863

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