A note about the deterministic property of characteristic functions

Author:

Norvidas Saulius1

Affiliation:

1. Institute of Data Science and Digital Technologies, Vilnius University

Abstract

We study an extension property for characteristic functions f : Rn → C of probability measures. More precisely, let f be the characteristic function of a probability density φ on Rn, and let Uσ = {x ∈ Rn: mink|xk| > σ}, σ > 0, be a neighborhood of infinity. We say that f has the σ-deterministic property if for any other characteristic function g such that f = g on Uσ, it follows that f ≡ g. A sufficient condition on f to has the σ-deterministic property is given. We also discuss the question about how precise our sufficient condition is? These results show that the σ-deterministic property of f depends on an arithmetic structure of the support of φ.

Publisher

Vilnius University Press

Subject

Applied Mathematics,Analysis

Reference9 articles.

1. 1. T. Gneiting, Curiosities of characteristic functions, Expo. Math., 19(4):359-363, 2001.

2. 2. L. Hörmander, The Analysis of Linear Partial differential Operators. I: Distribution Theory and Fourier Analysis, 2nd ed., Springer-Verlag, Berlin, Heidelberg, New York, 1990.

3. 3. S. Norvidas, On extensions of characteristic functions, Lith. Math. J., 57(2):236-243, 2017.

4. 4. S. Norvidas, A theorem of uniqueness for characteristic functions, C. R., Math., Acad. Sci. Paris, 355(8):920-924, 2017.

5. 5. M. Reiter, J.M. Stegeman, Classical Harmonic Analysis and Locally Compact Groups, Lond. Math. Soc. Monogr., New Ser., Vol. 22, Clarendon Press, Oxford, 2000.

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