Abstract
We obtain a sufficiently general variational formula for a Green’s function, which, in particular, implies the classic variational formulas of Hadamard and Schiffer.
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Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 170, No. 3, pp. 335–341, March, 2012.
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Suetin, S.P. An analogue of the Hadamard and Schiffer variational formulas. Theor Math Phys 170, 274–279 (2012). https://doi.org/10.1007/s11232-012-0029-2
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DOI: https://doi.org/10.1007/s11232-012-0029-2