Extremes and First Passage Times of Correlated Fractional Brownian Motions

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Type
Article: article from journal or magazin.
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Publications
Institution
Title
Extremes and First Passage Times of Correlated Fractional Brownian Motions
Journal
Stochastic Models
Author(s)
Hashorva E., Ji L.
ISSN
1532-6349 (Print)
1532-4214 (Electronic)
Publication state
Published
Issued date
2014
Peer-reviewed
Oui
Volume
30
Number
3
Pages
272-299
Language
english
Abstract
Let {X-i (t), t >= 0}, i = 1, 2 be two standard fractional Brownian motions being jointly Gaussian with constant cross-correlation. In this paper, we derive the exact asymptotics of the joint survival function
P {sups(is an element of)[(0,1]) X-1(s) > u, sup(t is an element of)[(0,1]) X-2(t) > u}
as u ->infinity. A novel finding of this contribution is the exponential approximation of the joint conditional first passage times of X-1, X-2. As a by-product, we obtain generalizations of the Borell-TIS inequality and the Piterbarg inequality for 2-dimensional Gaussian random fields. Keywords Borell-TIS inequality; Extremes; First passage times; Fractional Brownian motion; Gaussian random fields; Piterbarg inequality.
Keywords
Borell-TIS inequality, Extremes, First passage times, Fractional Brownian motion, Gaussian random fields, Piterbarg inequality
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20/03/2014 0:10
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20/08/2019 16:13
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