A counterexample to the smoothness of the solution to an equation arising in fluid mechanics

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We analyze the equation coming from the Eulerian-Lagrangian description of fluids. We discuss a couple of ways to extend this notion to viscous fluids. The main focus of this paper is to discuss the first way, due to Constantin. We show that this description can only work for short times, after which the ``back to coordinates map'' may have no smooth inverse. Then we briefly discuss a second way that uses Brownian motion. We use this to provide a plausibility argument for the global regularity for the Navier-Stokes equation.
Also available at http://www.math.missouri.edu/~stephen/preprints/ - This version has small corrections

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Analysis of PDEs, Algebraic Topology, Probability, Primary 35Q35, 76D05, Secondary 55M25, 60H30

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http://salesiana.dossiersoluciones.com/handle/123456789/61655

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0106113
 http://arxiv.org/abs/math/0106113
 Commentationes Mathematicae Universitatis Carolinae, 43, 1, (2002), 61-75

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arXiv