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Title: Symmetry-based characterizations of the exponential distribution (English)
Author: Ahmadi, Jafar
Author: Fashandi, Massoumeh
Language: English
Journal: Applications of Mathematics
ISSN: 0862-7940 (print)
ISSN: 1572-9109 (online)
Volume: 71
Issue: 3
Year: 2026
Pages: 455-470
Summary lang: English
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Category: math
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Summary: The exponential distribution is one of the most widely used continuous distributions in reliability theory, failure time analysis, Poisson processes, and survival analysis. In this paper, we establish new characterizations of the exponential distribution based on the probability integral transformation. Characterizations derived from both distributional relationships and moment properties of certain functions of the underlying variables are presented. Furthermore, analogous results for distributional relationships are obtained for functions of order statistics and $k$-record statistics. Using the completeness properties of the sequences of functions $\{(1-u)^{i-1}u^{n-i},0<u<1,n \ge i \ge 1\}$ and $\{(-\log u)^{n-1}, 0<u<1,n \ge 1\}$, moment-based characterization results are also established for functions of order statistics and $k$-record statistics, respectively. Since ordinary record values are special cases of $k$-records, the corresponding results hold for usual records as well. (English)
Keyword: characterization
Keyword: completeness property
Keyword: convexity (concavity)
Keyword: exponential distribution
Keyword: order statistics
Keyword: record values
MSC: 60E05
MSC: 62E10
MSC: 62G30
DOI: 10.21136/AM.2026.0289-25
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Date available: 2026-07-02T06:54:06Z
Last updated: 2026-08-19
Stable URL: http://hdl.handle.net/10338.dmlcz/153677
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