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We consider the problem of efficient estimation for the drift of fractional Brownian motion $B^H:=(B^H_t)_{t\in[0,T]}$ with hurst parameter $H$ less than 1/2. We also construct superefficient James-Stein type estimators which dominate,…

概率论 · 数学 2009-05-12 Es-Sebaiy Khalifa , Idir Ouassou , Youssef Ouknine

We show that the distribution of the square of the supremum of reflected fractional Brownian motion up to time a, with Hurst parameter-H greater than 1/2, is related to the distribution of its hitting time to level $1,$ using the self…

概率论 · 数学 2012-08-14 Ceren Vardar

In this paper, we consider a complex-valued d-dimensional fractional Brownian motion defined on the closure of the complex upper half-plane, called analytic fractional Brownian motion. This process has been introduced by the second author…

概率论 · 数学 2011-11-10 Samy Tindel , Jérémie Unterberger

We consider a stationary fluid queue with fractional Brownian motion input. Conditional on the workload at time zero being greater than a large value $b$, we provide the limiting distribution for the amount of time that the workload process…

概率论 · 数学 2009-12-11 Hernan Awad , Peter Glynn

We derive estimates for the solutions to differential equations driven by a H\"older continuous function of order $\beta>1/2$. As an application we deduce the existence of moments for the solutions to stochastic partial differential…

概率论 · 数学 2007-05-23 Yaozhong Hu David Nualart

A class of Gaussian processes generalizing the usual fractional Brownian motion for Hurst indices in (1/2,1) and multifractal Brownian motion introduced in Ralchenko and Shevchenko (Theory Probab Math Stat 80, 2010) and Boufoussi et al.…

概率论 · 数学 2013-07-08 Jelena Ryvkina

We study the problem of parametric estimation for continuously observed stochastic processes driven by additive small fractional Brownian motion with Hurst index 0<H<1/2 and 1/2<H<1. Under some assumptions on the drift coefficient, we…

统计理论 · 数学 2022-01-04 Shohei Nakajima , Yasutaka Shimizu

For a class of non-autonomous parabolic stochastic partial differential equations defined on a bounded open subset $D\subset \mathbb {R}^d$ and driven by an $L^2(D)$-valued fractional Brownian motion with the Hurst index $H>1/2$, a new…

概率论 · 数学 2020-01-17 Kostiantyn Ralchenko , Georgiy Shevchenko

We consider slow / fast systems where the slow system is driven by fractional Brownian motion with Hurst parameter $H>{1\over 2}$. We show that unlike in the case $H={1\over 2}$, convergence to the averaged solution takes place in…

概率论 · 数学 2023-03-07 Martin Hairer , Xue-Mei Li

We study the issue of integration with respect to the non-commutative fractional Brownian motion, that is the analog of the standard fractional Brownian in a non-commutative probability setting.When the Hurst index $H$ of the process is…

概率论 · 数学 2018-03-14 Aurélien Deya , René Schott

Let $\{B_t,t\geq0\}$ be a d-dimensional Brownian motion. We prove that the approximation of the higher derivative of renormalized self-intersection local time $$…

概率论 · 数学 2024-03-18 Xiaoyan Xu , Xianye Yu

We study the asymptotic properties of an estimator of Hurst parameter of a stochastic differential equation driven by a fractional Brownian motion with $H > 1/2$. Utilizing the theory of asymptotic expansion of Skorohod integrals introduced…

概率论 · 数学 2024-07-03 Hayate Yamagishi

In this paper, we introduce the linear fractional self-attracting diffusion driven by a fractional Brownian motion with Hurst index 1/2<H<1, which is analogous to the linear self-attracting diffusion. For 1-dimensional process we study its…

概率论 · 数学 2007-07-19 Litan Yan , Yu Sun , Yunsheng Lu

Our aim in this article is to provide explicit computable estimates for the cumulative distribution function (c.d.f.) and the $p$-th order moment of the exponential functional of a fractional Brownian motion (fBM) with drift. Using…

概率论 · 数学 2024-03-18 José Alfredo López-Mimbela , Gerardo Pérez-Suárez

We give a new representation of fractional Brownian motion with Hurst parameter H<=1/2 using stochastic partial differential equations. This representation allows us to use the Markov property and time reversal, tools which are not usually…

概率论 · 数学 2012-01-31 Carl Mueller , Zhixin Wu

We study fractional Brownian motion (fBm) characterized by the Hurst exponent H. Using a Monte Carlo sampling technique, we are able to numerically generate fBm processes with an absorbing boundary at the origin at discrete times for a…

统计力学 · 物理学 2015-06-15 Alexander K. Hartmann , Satya N. Majumdar , Alberto Rosso

Let $X$ be a (two-sided) fractional Brownian motion of Hurst parameter $H\in (0,1)$ and let $Y$ be a standard Brownian motion independent of $X$. Fractional Brownian motion in Brownian motion time (of index $H$), recently studied in…

概率论 · 数学 2013-12-04 Ivan Nourdin , Raghid Zeineddine

We propose a new algorithm to generate a fractional Brownian motion, with a given Hurst parameter, 1/2<H<1 using the correlated Bernoulli random variables with parameter p; having a certain density. This density is constructed using the…

统计计算 · 统计学 2019-05-15 Buket Coskun , Ceren Vardar-Acar , Hakan Demirtas

We derive a new theoretical lower bound for the expected supremum of drifted fractional Brownian motion with Hurst index $H\in(0,1)$ over (in)finite time horizon. Extensive simulation experiments indicate that our lower bound outperforms…

概率论 · 数学 2022-01-04 Krzysztof Bisewski

In $\R^d$, for any dimension $d\geq 1$, expansions of self-intersection local times of fractional Brownian motions with arbitrary Hurst coefficients in $(0,1)$ are presented. The expansions are in terms of Wick powers of white noises…

数学物理 · 物理学 2010-02-10 Custodia Drumond , Maria Joao Oliveira , Jose Luis da Silva