Diffusion approximation for fully coupled stochastic differential equations

M Röckner, L **e - 2021 - projecteuclid.org
We consider a Poisson equation in R d for the elliptic operator corresponding to an ergodic
diffusion process. Optimal regularity and smoothness with respect to the parameter are …

Averaging principle and normal deviations for multiscale stochastic systems

M Röckner, L **e - Communications in Mathematical Physics, 2021 - Springer
We study the asymptotic behavior for an inhomogeneous multiscale stochastic dynamical
system with non-smooth coefficients. Depending on the averaging regime and the …

Poisson equations with locally-Lipschitz coefficients and uniform in time averaging for stochastic differential equations via strong exponential stability

D Crisan, P Dobson, B Goddard, M Ottobre… - arxiv preprint arxiv …, 2022 - arxiv.org
We study Poisson equations and averaging for Stochastic Differential Equations (SDEs).
Poisson equations are essential tools in both probability theory and partial differential …

Rate of homogenization for fully-coupled McKean–Vlasov SDEs

ZW Bezemek, K Spiliopoulos - Stochastics and Dynamics, 2023 - World Scientific
In this paper, we consider a fully-coupled slow–fast system of McKean–Vlasov stochastic
differential equations with full dependence on the slow and fast component and on the law …

Moderate deviations for fully coupled multiscale weakly interacting particle systems

ZW Bezemek, K Spiliopoulos - Stochastics and Partial Differential …, 2024 - Springer
We consider a collection of fully coupled weakly interacting diffusion processes moving in a
two-scale environment. We study the moderate deviations principle of the empirical …

Large deviations for interacting multiscale particle systems

ZW Bezemek, K Spiliopoulos - Stochastic Processes and their Applications, 2023 - Elsevier
We consider a collection of weakly interacting diffusion processes moving in a two-scale
locally periodic environment. We study the large deviations principle of the empirical …

Moderate deviations for systems of slow-fast diffusions

MR Morse, K Spiliopoulos - Asymptotic Analysis, 2017 - content.iospress.com
In this paper, we prove the moderate deviations principle (MDP) for a general system of slow-
fast dynamics. We provide a unified approach, based on weak convergence ideas and …

Fisher information bounds and applications to SDEs with small noise

NT Dung, NT Hang - Stochastic Processes and their Applications, 2024 - Elsevier
In this paper, we first establish general bounds on the Fisher information distance to the
class of normal distributions of Malliavin differentiable random variables. We then study the …

Averaging principle and normal deviation for multi-scale SDEs with polynomial nonlinearity

M Cheng, Z Liu, M Röckner - arxiv preprint arxiv:2308.10751, 2023 - arxiv.org
We investigate three types of averaging principles and the normal deviation for multi-scale
stochastic differential equations (in short, SDEs) with polynomial nonlinearity. More …

Average principles and large deviation principles of multiscale multivalued McKean-Vlasov stochastic systems

H Qiao - arxiv preprint arxiv:2307.14561, 2023 - arxiv.org
This work concerns about multiscale multivalued McKean-Vlasov stochastic systems. First of
all, we establish the well-posedness for multivalued McKean-Vlasov stochastic systems …