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Ill-posedness of the incompressible Navier-Stokes equations in $\dot{F}^{-1,q}_{\infty}({R}^3)$ (1302.7084v1)

Published 28 Feb 2013 in math.AP

Abstract: In this paper, authors show the ill-posedness of 3D incompressible Navier-Stokes equations in the critical Triebel-Lizorkin spaces $ \dot{F}{-1,q}_{\infty} (\mathbb{R}3) $ for any $ q>2 $ in the sense that arbitrarily small initial data of $ \dot{F}{-1,q}_{\infty}(\mathbb{R}3) $ can lead the corresponding solution to become arbitrarily large after an arbitrarily short time. In view of the well-posedness of 3D-incompressible Navier-Stokes equations in $ BMO{-1} $ (i.e. the Triebel-Lizorkin space $ \dot{F}{-1,2}_{\infty}(\mathbb{R}3) $) by Koch and Tataru, our work completes a dichotomy of well-posedness and ill-posedness in the Triebel-Lizorkin space framework depending on $ q=2 $ or $ q>2 $.

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