Abstract
Let g be a linear combination with quasipolynomial coefficients of shifts of the Jacobi theta function and its derivatives in the argument. All entire functions f: ℂ → ℂ satisfying f(x+y)g(x−y) = α1(x)β1(y)+· · ·+αr(x)βr(y) for some r ∈ ℕ and αj, βj: ℂ → ℂ are described.
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Translated from Funktsional’nyi Analiz i Ego Prilozheniya, Vol. 52, No. 3, pp. 84–87, 2018 Original Russian Text Copyright © by A. A. Illarionov and M. A. Romanov
This work was supported by RFBR grant 17-01-00225.
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Illarionov, A.A., Romanov, M.A. Hyperquasipolynomials for the Theta-Function. Funct Anal Its Appl 52, 228–231 (2018). https://doi.org/10.1007/s10688-018-0232-5
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DOI: https://doi.org/10.1007/s10688-018-0232-5