Home Mathematics A property of Cauchy–Stieltjes kernel families based on dilation of measures
Article
Licensed
Unlicensed Requires Authentication

A property of Cauchy–Stieltjes kernel families based on dilation of measures

  • Ibrahim-Elkhalil Ahmed , Ayed R. A. Alanzi and Raouf Fakhfakh EMAIL logo
Published/Copyright: May 29, 2025
Become an author with De Gruyter Brill

Abstract

In this paper, we introduce a property of the inverse Semicircle and the free Gamma laws based on the dilation of measures in the context of Cauchy–Stieltjes Kernel (CSK) families. Assume that the CSK family produced by a non-degenerate probability measure λ on with support limited from above is + ( λ ) = { 𝒬 m λ ( d y ) : m ( m 1 λ , m + λ ) } . For α 0 , consider 𝐇 α , x α x and provide the set of measures

𝐇 α ( + ( λ ) ) = { 𝐇 α ( 𝒬 m λ ( d y ) ) : m ( m 1 λ , m + λ ) } .

Let us say that α > 0 . We demonstrate that if 𝐇 α ( + ( λ ) ) is a re-parametrization of + ( λ ) (i.e., 𝐇 α ( + ( λ ) ) = + ( λ ) ), then λ is either the free Gamma type law or the inverse Semicircle type law up to scaling.

MSC 2020: 60E10; 46L54

Funding statement: This work was funded by the Deanship of Graduate Studies and Scientific Research at Jouf University under grant No. (DGSSR-2024-02-01194).

References

[1] W. Bryc, Free exponential families as kernel families, Demonstr. Math. 42 (2009), no. 3, 657–672. 10.1515/dema-2009-0320Search in Google Scholar

[2] W. Bryc, R. Fakhfakh and A. Hassairi, On Cauchy–Stieltjes kernel families, J. Multivariate Anal. 124 (2014), 295–312. 10.1016/j.jmva.2013.10.021Search in Google Scholar

[3] W. Bryc and A. Hassairi, One-sided Cauchy–Stieltjes kernel families, J. Theoret. Probab. 24 (2011), no. 2, 577–594. 10.1007/s10959-010-0303-xSearch in Google Scholar

[4] R. Fakhfakh, Variance function of boolean additive convolution, Statist. Probab. Lett. 163 (2020), Article ID 108777. 10.1016/j.spl.2020.108777Search in Google Scholar

[5] R. Fakhfakh, On some properties of Cauchy–Stieltjes kernel families, Indian J. Pure Appl. Math. 52 (2021), no. 4, 1186–1200. 10.1007/s13226-021-00020-zSearch in Google Scholar

[6] R. Fakhfakh, A characterization of the Marchenko-Pastur probability measure, Statist. Probab. Lett. 191 (2022), Article ID 109660. 10.1016/j.spl.2022.109660Search in Google Scholar

[7] R. Fakhfakh, Explicit free multiplicative law of large numbers, Comm. Statist. Theory Methods 52 (2023), no. 7, 2031–2042. 10.1080/03610926.2021.1944212Search in Google Scholar

Received: 2024-06-02
Accepted: 2025-03-25
Published Online: 2025-05-29

© 2025 Walter de Gruyter GmbH, Berlin/Boston

Downloaded on 21.12.2025 from https://www.degruyterbrill.com/document/doi/10.1515/gmj-2025-2032/pdf
Scroll to top button