Global Regularity of the 4D Restricted Euler Equations

Details Global Regularity of the 4D Restricted Euler Equations Global Regularity of the 4D Restricted Euler Equations

2008-10-10

arxiv.org/abs/0810.1964v1

Mathematics

Analysis of PDEs

Scientific paper

We are concerned with the critical threshold phenomena in the Restricted Euler (RE) equations. Using the spectral and trace dynamics we identify the critical thresholds for 3D and the 4D restricted Euler equations. It is well known that the 3D RE solutions blow up. Projected on the 3-sphere, the set of initial eigenvalues which give rise to bounded stable solutions is reduced to a single point, which confirms that 3D RE blowup is generic. In contrast, we identify a surprisingly rich set of the initial spectrum on the 4-sphere which yields global smooth solutions; thus, 4D regularity is generic.

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