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The Galerkin analysis for the random periodic solution of semilinear stochastic evolution equations

Abstract:
In this paper, we study the numerical method for approximating the random periodic solution of semilinear stochastic evolution equations. The main challenge lies in proving a convergence over an infinite time horizon while simulating infinite-dimensional objects. We first show the existence and uniqueness of the random periodic solution to the equation as the limit of the pull-back flows of the equation, and observe that its mild form is well defined in the intersection of a family of decreasing Hilbert spaces. Then, we propose a Galerkin-type exponential integrator scheme and establish its convergence rate of the strong error to the mild solution, where the order of convergence directly depends on the space (among the family of Hilbert spaces) for the initial point to live. We finally conclude with a best order of convergence that is arbitrarily close to 0.5.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1007/s10959-023-01236-x

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
ORCID:
0000-0002-6281-2229


Publisher:
Springer
Journal:
Journal of Theoretical Probability More from this journal
Volume:
37
Issue:
1
Pages:
133-159
Publication date:
2023-01-25
Acceptance date:
2023-01-05
DOI:
EISSN:
1572-9230
ISSN:
0894-9840


Language:
English
Keywords:
Pubs id:
1325382
Local pid:
pubs:1325382
Deposit date:
2023-01-26

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