Results 1 to 10 of about 891 (38)

Geometric fractional Brownian motion model for commodity market simulation

open access: yesAlexandria Engineering Journal, 2021
The geometric Brownian motion (GBM) model is a mathematical model that has been used to model asset price paths. By incorporating Hurst parameter to GBM to characterize long-memory phenomenon, the geometric fractional Brownian motion (GFBM) model was ...
Siti Nur Iqmal Ibrahim   +2 more
doaj   +1 more source

Stochastic optimal and time-optimal control studies for additional food provided prey–predator systems involving Holling type III functional response

open access: yesComputational and Mathematical Biophysics, 2023
This article consists of a detailed and novel stochastic optimal control analysis of a coupled non-linear dynamical system. The state equations are modelled as an additional food-provided prey–predator system with Holling type III functional response for
Prakash Daliparthi Bhanu   +1 more
doaj   +1 more source

The moments of the area under reflected Brownian bridge conditional on its local time at zero

open access: yesInternational Journal of Stochastic Analysis, Volume 13, Issue 2, Page 99-124, 2000., 2000
This paper develops a recursion formula for the conditional moments of the area under the absolute value of Brownian bridge given the local time at 0. The method of power series leads to a Hermite equation for the generating function of the coefficients which is solved in terms of the parabolic cylinder functions.
Frank B. Knight
wiley   +1 more source

Sojourn times for the Brownian motion

open access: yesInternational Journal of Stochastic Analysis, Volume 11, Issue 3, Page 231-246, 1998., 1998
In this paper explicit formulas are given for the distribution function, the density function and the moments of the sojourn time for the reflecting Brownian motion process.
Lajos Takács
wiley   +1 more source

Brownian local times

open access: yesInternational Journal of Stochastic Analysis, Volume 8, Issue 3, Page 209-232, 1995., 1995
In this paper explicit formulas are given for the distribution functions and the moments of the local times of the Brownian motion, the reflecting Brownian motion, the Brownian meander, the Brownian bridge, the reflecting Brownian bridge and the Brownian excursion.
Lajos Takács
wiley   +1 more source

Square variation of Brownian paths in Banach spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 5, Issue 3, Page 605-607, 1982., 1982
It is known that if {W(t), 0 ≤ t ≤ 1} is a standard Brownian motion in ℝ then almost surely. We generalize this celebrated theorem of Levy to Brownian motion in real separable Banach spaces.
Mou-Hsiung Chang
wiley   +1 more source

A note on local asymptotic behaviour for Brownian motion in Banach spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2, Issue 4, Page 669-676, 1979., 1979
In this paper we obtain an integral characterization of a two‐sided upper function for Brownian motion in a real separable Banach space. This characterization generalizes that of Jain and Taylor [2] where B = ℝn. The integral test obtained involves the index of a mean zero Gaussian measure on the Banach space, which is due to Kuelbs [3].
Mou-Hsiung Chang
wiley   +1 more source

Analysis of a fractional-order prey-predator model with prey refuge and predator harvest using the consumption number: Holling type III functional response

open access: yesComputational and Mathematical Biophysics
In this article, we study a fractional-order prey-predator model incorporating prey refuge and predator harvesting, employing a Holling type III functional response.
Aguegboh Nnaemeka Stanley   +5 more
doaj   +1 more source

Macroscopic limit of a Fokker-Planck model of swarming rigid bodies

open access: yesEuropean Journal of Applied Mathematics
We consider self-propelled rigid bodies interacting through local body-attitude alignment modelled by stochastic differential equations. We derive a hydrodynamic model of this system at large spatio-temporal scales and particle numbers in any dimension
Pierre Degond, Amic Frouvelle
doaj   +1 more source

Analytic solution of a fractional-order hepatitis model using Laplace Adomian decomposition method and optimal control analysis

open access: yesComputational and Mathematical Biophysics
Infectious illnesses like hepatitis place a heavy cost on global health, and precise mathematical models must be created in order to understand and manage them.
Aguegboh Nnaemeka S.   +4 more
doaj   +1 more source

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