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Annals of Mathematics, II. Series Vol. 148, No. 3, pp. 11351152 (1998) 

Nonexistence of simple hyperbolic blowup for the quasigeostrophic equationDiego CordobaReview from Zentralblatt MATH: The author considers a twodimensional active scalar model for the 3D Euler vorticity equation. One defines a naturally associated notion of simple hyperbolic saddle breakdown and it is shown that such a breakdown cannot occur in finite time. Reviewed by V.A.Sava Keywords: Euler vorticity equation; quasigeostrophic equation; singularity; stream function Classification (MSC2000): 35Q35 76B47 86A05 Full text of the article:
Electronic fulltext finalized on: 9 Sep 2001. This page was last modified: 22 Jan 2002.
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