Results 21 to 30 of about 3,960 (256)

On Squared Fractional Brownian Motions [PDF]

open access: yes, 2004
We have proved recently that fractional Brownian motions with Hurst parameter H in (0, 1/2) satisfy a remarkable property: their squares are infinitely divisible. In the Brownian motion case (the case H = 1/2), this property is completely understood thanks to stochastic calculus arguments.
Eisenbaum, N., Tudor, C.A.
openaire   +2 more sources

Stock Prediction Model Based on Mixed Fractional Brownian Motion and Improved Fractional-Order Particle Swarm Optimization Algorithm

open access: yesFractal and Fractional, 2022
As one of the main areas of value investing, the stock market attracts the attention of many investors. Among investors, market index movements are a focus of attention.
Hongwen Hu   +3 more
doaj   +1 more source

The fractional mixed fractional brownian motion and fractional brownian sheet [PDF]

open access: yesESAIM: Probability and Statistics, 2007
Summary: We introduce the fractional mixed fractional Brownian motion and fractional Brownian sheet, and investigate the small ball behavior of its sup-norm statistic. Then, we state general conditions and characterize the sufficiency part of the lower classes of some statistics of the above process by an integral test.
openaire   +2 more sources

Prediction law of fractional Brownian motion [PDF]

open access: yesStatistics & Probability Letters, 2017
We calculate the regular conditional future law of the fractional Brownian motion with index $H\in(0,1)$ conditioned on its past. We show that the conditional law is continuous with respect to the conditioning path. We investigate the path properties of the conditional process and the asymptotic behavior of the conditional covariance.
Viitasaari, Lauri, Sottinen, Tommi
openaire   +7 more sources

Anticipated BSDEs Driven by Fractional Brownian Motion with a Time-Delayed Generator

open access: yesMathematics, 2023
This article describes a new form of an anticipated backward stochastic differential equation (BSDE) with a time-delayed generator driven by fractional Brownian motion, further known as fractional BSDE, with a Hurst parameter H∈(1/2,1).
Pei Zhang   +2 more
doaj   +1 more source

Search efficiency of discrete fractional Brownian motion in a random distribution of targets

open access: yesPhysical Review Research, 2021
Efficiency of search for randomly distributed targets is a prominent problem in many branches of the sciences. For the stochastic process of Lévy walks, a specific range of optimal efficiencies was suggested under variation of search intrinsic and ...
S. Mohsen J. Khadem   +2 more
doaj   +1 more source

Operator Fractional Brownian Motion and Martingale Differences

open access: yesAbstract and Applied Analysis, 2014
It is well known that martingale difference sequences are very useful in applications and theory. On the other hand, the operator fractional Brownian motion as an extension of the well-known fractional Brownian motion also plays an important role in both
Hongshuai Dai   +2 more
doaj   +1 more source

Asset Pricing Model Based on Fractional Brownian Motion

open access: yesFractal and Fractional, 2022
This paper introduces one unique price motion process with fractional Brownian motion. We introduce the imaginary number into the agent’s subjective probability for the reason of convergence; further, the result similar to Ito Lemma is proved.
Yu Yan, Yiming Wang
doaj   +1 more source

Mixed Fractional Brownian Motion [PDF]

open access: yesBernoulli, 2001
Let \(B\) be the standard Brownian motion and \(B^H\) fractional Brownian motion with Hurst index \(H\in (0,1]\). If the Brownian motion \(B\) and the fractional Brownian motion \(B^H\) are independent and \(\alpha\in\mathbb{R} \setminus \{0\}\), define the mixed fractional Brownian motion \(M^{H,\alpha}\) by \(M^{H,\alpha} \doteq B+\alpha B^H\).
openaire   +3 more sources

重分数布朗运动的列维连续模(Lévy's moduli of continuity of multifractional Brownian motion)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2000
This paper proposed Lévy's moduli of continuity of multifractional Brownian motion,which is a generalization of the fractional Brownian motion.
LINZheng-yan(林正炎)
doaj   +1 more source

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