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Limit theorems for measure-valued processes of the level-exceedance type

Published online by Cambridge University Press:  05 January 2012

Andriy Yurachkivsky*
Affiliation:
Taras Shevchenko National University, vul. Volodymyrska 64, Kyiv, 01601, Ukraine. yap@univ.kiev.ua
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Abstract

Let, for each tT, ψ(t, ۔) be a random measure on the Borel σ-algebra in ℝd such that Eψ(t, ℝd)k < ∞ for all k and let $\widehat{\psi}$(t, ۔) be its characteristic function. We call the function $\widehat{\psi}$ (t1,…, tl ; z1,…, zl) = ${\sf E}\prod^l_{j=1}\widehat{\psi}(t_j, z_j)$ of arguments l ℕ, t1, t2T, z1, z2d the covaristic of the measure-valued random function (MVRF) ψ(۔, ۔). A general limit theorem for MVRF's in terms of covaristics is proved and applied to functions of the kind ψn(t, B) = µ{x : ξn(t, x) B}, where μ is a nonrandom finite measure and, for each n, ξn is a time-dependent random field.


Type
Research Article
Copyright
© EDP Sciences, SMAI, 2011

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