## Taiwanese Journal of Mathematics

### Arbitrary High-order EQUIP Methods for Stochastic Canonical Hamiltonian Systems

#### Abstract

This paper is concerned with arbitrary high-order energy-preserving numerical methods for stochastic canonical Hamiltonian systems. Energy and quadratic invariants-preserving (EQUIP) methods for deterministic Hamiltonian systems are applied to stochastic canonical Hamiltonian systems and analyzed accordingly. A class of stochastic parametric Runge-Kutta methods with a truncation technique of random variables are obtained. Increments of Wiener processes are replaced by some truncated random variables. We prove the replacement doesn't change the convergence order under some conditions. The methods turn out to be symplectic for any given parameter. It is shown that there exists a parameter $\alpha_{n}^{*}$ at each step such that the energy-preserving property holds, and the energy-preserving methods retain the order of the underlying stochastic Gauss Runge-Kutta methods. Numerical results illustrate the effectiveness of EQUIP methods when applied to stochastic canonical Hamiltonian systems.

#### Article information

Source
Taiwanese J. Math., Volume 23, Number 3 (2019), 703-725.

Dates
Revised: 21 May 2018
Accepted: 1 August 2018
First available in Project Euclid: 10 August 2018

https://projecteuclid.org/euclid.twjm/1533866419

Digital Object Identifier
doi:10.11650/tjm/180803

Mathematical Reviews number (MathSciNet)
MR3952248

Zentralblatt MATH identifier
07068571

#### Citation

Li, Xiuyan; Zhang, Chiping; Ma, Qiang; Ding, Xiaohua. Arbitrary High-order EQUIP Methods for Stochastic Canonical Hamiltonian Systems. Taiwanese J. Math. 23 (2019), no. 3, 703--725. doi:10.11650/tjm/180803. https://projecteuclid.org/euclid.twjm/1533866419

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