Even positive-definite hyperbolically convex functions in a Hilbert space. Representations of Hilbert spaces by self-adjoint operators von Lopotko, O., Лопотко, Олег

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Integral representation of even positive-definite functions of two variables von Lopotko, O. V., Лопотко, О. В.

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Integral representation of even positive-definite functions of one variable von Lopotko, O. V., Лопотко, О. В.

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Representations of the additive group of a nuclear space in terms of self-adjoint operators von Lopotko, O. V., Лопотко, О. В., Лопотко, О. В.

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On the extension of even-positive-definite functions of one and two variables von Lopotko, O. V., Лопотко, О. В., Лопотко, О. В.

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