Jun 3
On the geometry of solutions of the Quasi-geostrophic equation
D. Cordoba (U. Chicago)
We study solutions of the 2D Quasi-geostrophic equation involving a simple
hyperbolic saddle. There is a naturally associated notion of simple
hyperbolic saddle breakdown. It is proved that such a breakdown cannot
occur in finite time. At large time, these solutions may grow at most at a
quadruple-exponential rate.
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