The geometry of a vorticity model equation

Details The geometry of a vorticity model equation The geometry of a vorticity model equation

2010-10-23

arxiv.org/abs/1010.4844v1

Communications on Pure and Applied Analysis 11, 4 (2012) 1407 - 1419

Mathematics

Analysis of PDEs

24 pages

Scientific paper

10.3934/cpaa.2012.11.1407

We provide rigorous evidence of the fact that the modified Constantin-Lax-Majda equation modeling vortex and quasi-geostrophic dynamics describes the geodesic flow on the subgroup of orientation-preserving diffeomorphisms fixing one point, with respect to right-invariant metric induced by the homogeneous Sobolev norm $H^{1/2}$ and show the local existence of the geodesics in the extended group of diffeomorphisms of Sobolev class $H^{k}$ with $k\ge 2$.

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