Convex integration constructions in hydrodynamics

Buckmaster, Tristan; Vicol, Vlad

doi:10.1090/bull/1713

Convex integration constructions in hydrodynamics
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by Tristan Buckmaster and Vlad Vicol;

Bull. Amer. Math. Soc. 58 (2021), 1-44

DOI: https://doi.org/10.1090/bull/1713

Published electronically: November 2, 2020

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Abstract:

We review recent developments in the field of mathematical fluid dynamics which utilize techniques that go under the umbrella name convex integration. In the hydrodynamical context, these methods produce paradoxical solutions to the fluid equations which defy physical laws. These counterintuitive solutions have a number of properties that resemble predictions made by phenomenological theories of fluid turbulence. The goal of this review is to highlight some of these similarities while maintaining an emphasis on rigorous mathematical statements. We focus our attention on the construction of weak solutions for the incompressible Euler, Navier–Stokes, and magneto-hydrodynamic equations which violate these systems’ physical energy laws.

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