Almost sure well-posedness for incompressible Navier-Stokes equations with arbitrary regularity

Abstract

In this paper, we study the random data problem for incompressible Navier-Stokes equations in Euclidean space. We prove that for any $s\in \mathbb{R}$, the almost sure local well-posedness holds in $H^s(\mathbb{R}^d)$ when $d\geq2$, and the almost sure global well-posedness holds in $H^s(\mathbb{R}^2)$. Our results have no regularity restriction, and thus can cover arbitrary rough data.Comment: 19 page