Limit Theorem for the Maximum of Random Variables Connected by IT-Copulas of Student's $t$-Distribution

Savinov, Evgeniy

doi:10.1137/s0040585x97t987260

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2015

2024

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Cited by 5 publications

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“…Note that maxima in a series scheme were previously considered in [15] for random variables related by IT-copulas (individuated t-copulas), and conditions were derived under which the maxima asymptotically grow as in the case of independent variables, i.e., in our terms, θ = 1.…”

Section: Introductionmentioning

confidence: 97%

Extremal Indices in a Series Scheme and Their Applications

2015

Inf.Appl.

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We generalize the concept of extremal index of a stationary random sequence to the series scheme of identically distributed random variables with random series sizes tending to infinity in probability. We introduce new extremal indices through two definitions generalizing the basic properties of the classical extremal index. We prove some useful properties of the new extremal indices. We show how the behavior of aggregate activity maxima on random graphs (in information network models) and the behavior of maxima of random particle scores in branching processes (in biological population models) can be described in terms of the new extremal indices. We also obtain new results on models with copulas and threshold models. We show that the new indices can take different values for the same system, as well as values greater than one.

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Section: Introductionmentioning

confidence: 97%