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research article

Global existence for perturbations of the 2D stochastic Navier-Stokes equations with space-time white noise

Hairer, Martin  
•
Rosati, Tommaso
June 1, 2024
Annals Of Pde

We prove global in time well-posedness for perturbations of the 2D stochastic Navier-Stokes equations partial derivative( t)u + u center dot del u = Delta u - del p + sigma + xi, u(0, center dot ) = u(0),div (u) = 0, driven by additive space-time white noise xi, with perturbation sigma in the H & ouml;lder-Besov space C-2+3K, periodic boundary conditions and initial condition u(0)is an element of C-1+K for any K>0. The proof relies on an energy estimate which in turn builds on a dynamic high-low frequency decomposition and tools from paracontrolled calculus. Our argument uses that the solution to the linear equation is a log-correlated field, yielding a double exponential growth bound on the solution. Notably, our method does not rely on any explicit knowledge of the invariant measure to the SPDE, hence the perturbation sigma is not restricted to the Cameron-Martin space of the noise, and the initial condition may be anticipative. Finally, we introduce a notion of weak solution that leads to well-posedness for all initial data u(0 )in L-2, the critical space of initial conditions.

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Type
research article
DOI
10.1007/s40818-023-00165-6
Web of Science ID

WOS:001136333100001

Author(s)
Hairer, Martin  
Rosati, Tommaso
Date Issued

2024-06-01

Publisher

Springernature

Published in
Annals Of Pde
Volume

10

Issue

1

Start page

3

Subjects

Physical Sciences

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PROPDE  
FunderGrant Number

Royal Society research professorship of MH

RP\R1\191065

Available on Infoscience
February 21, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/204994
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