On generalised Piterbarg constants

B Long, K Debicki, E Hashorva… - … and Computing in …, 2018 - search.proquest.com
We investigate generalised Piterbarg constants P α, δ h= lim T→∞ E sup t∈ δℤ∩[0, T] e 2 B
α (t)−| t| α− h (t) determined in terms of a fractional Brownian motion B α with Hurst index …

[HTML][HTML] Extremes of vector-valued Gaussian processes

K Dȩbicki, E Hashorva, L Wang - Stochastic Processes and their …, 2020 - Elsevier
The seminal papers of Pickands (Pickands, 1967; Pickands, 1969) paved the way for a
systematic study of high exceedance probabilities of both stationary and non-stationary …

Ruin problem of a two-dimensional fractional Brownian motion risk process

L Ji, S Robert - Stochastic Models, 2018 - Taylor & Francis
This paper investigates ruin probability and ruin time of a two-dimensional fractional
Brownian motion risk process. The net loss process of an insurance company is modeled by …

Sojourn times of Gaussian processes with trend

K Dȩbicki, P Liu, Z Michna - Journal of Theoretical Probability, 2020 - Springer
We derive exact tail asymptotics of sojourn time above the level u≥ 0 P v (u)∫ 0 TI (X (t)-ct>
u) dt> x, x≥ 0, as u→∞, where X is a Gaussian process with continuous sample paths, c is …

Approximation of supremum of max-stable stationary processes & Pickands constants

K Dȩbicki, E Hashorva - Journal of Theoretical Probability, 2020 - Springer
Let X (t), t ∈ RX (t), t∈ R be a stochastically continuous stationary max-stable process with
Fréchet marginals Φ _ α, α> 0 Φ α, α> 0 and set M_X (T)=\sup _ t ∈ 0, TX (t), T> 0 MX (T) …

Approximation of sojourn times of Gaussian processes

K Dȩbicki, Z Michna, X Peng - Methodology and Computing in Applied …, 2019 - Springer
We investigate the tail asymptotic behavior of the sojourn time for a large class of centered
Gaussian processes X, in both continuous-and discrete-time framework. All results obtained …

Extremes of Gaussian random fields with regularly varying dependence structure

K Dȩbicki, E Hashorva, P Liu - Extremes, 2017 - Springer
Let X (t), t∈ 𝓣 X(t),t∈T be a centered Gaussian random field with variance function σ 2 (⋅)
that attains its maximum at the unique point t 0∈ 𝓣 t_0∈T, and let M (𝓣)= sup t∈ TX (t) …

Sojourn times of Gaussian related random fields

K Dȩbicki, E Hashorva, P Liu, Z Michna - arXiv preprint arXiv:2101.11603, 2021 - arxiv.org
This paper is concerned with the asymptotic analysis of sojourn times of random fields with
continuous sample paths. Under a very general framework we show that there is an …

Extremes of threshold-dependent Gaussian processes

L Bai, K Dȩbicki, E Hashorva, L Ji - Science China Mathematics, 2018 - Springer
In this paper, we are concerned with the asymptotic behavior, as u → ∞ u→∞, of P\left {\sup
_ t ∈ 0, T X_u (t)> u\right\} P supt∈ 0, TX u (t)> u, where X_u (t), t ∈ 0, T, u> 0 X u (t), t∈ 0, T …

Sojourns of fractional Brownian motion queues: transient asymptotics

K Dȩbicki, E Hashorva, P Liu - Queueing Systems, 2023 - Springer
We study the asymptotics of sojourn time of the stationary queueing process Q (t), t≥ 0 fed
by a fractional Brownian motion with Hurst parameter H∈(0, 1) above a high threshold u …