Abstract
It is shown that one cannot define a transformation analogous to the Fourier transformation, carrying a function into a function, for functions defined on a Hilbert space.
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V. I. Averbukh, O. G. Smolyanov, and S. V. Fomin, “Generalized functions and differential equations in linear spaces,” Tr. Mosk. Matem. Ob-va,24, 133–174 (1971).
I. M. Gel'fand and N. Ya. Vilenkin, Generalized Functions, Vol. 4, Applications of Harmonic Analysis, Academic Press, New York (1964).
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Translated from Matematicheskie Zametki, Vol. 14, No. 4, pp. 465–468, October, 1973.
I am grateful to O. G. Smolyanov for constant interest.
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Bentkus, V.Y. The Fourier transformation of functions defined on a Hilbert space. Mathematical Notes of the Academy of Sciences of the USSR 14, 825–826 (1973). https://doi.org/10.1007/BF01108805
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DOI: https://doi.org/10.1007/BF01108805