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Non-conservative $H^{\frac 12-}$ weak solutions of the incompressible 3D Euler equations

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arxiv 2101.09278 v2 pith:UGDKFAS3 submitted 2021-01-22 math.AP

classification math.AP
keywords fracregularitysolutionsbetaconstructequationseulerincompressible
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abstract

For any positive regularity parameter $\beta < \frac 12$, we construct non-conservative weak solutions of the 3D incompressible Euler equations which lie in $H^{\beta}$ uniformly in time. In particular, we construct solutions which have an $L^2$-based regularity index \emph{strictly larger} than $\frac 13$, thus deviating from the $H^{\frac{1}{3}}$-regularity corresponding to the Kolmogorov-Obhukov $\frac 53$ power spectrum in the inertial range.

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  1. An Onsager type theorem for the Euler-Boussinesq equations in two spatial dimensions

    math.AP 2025-02 conditional novelty 6.0 of 10

    For every γ<1/3, there exist compactly supported weak solutions (v,θ) to the 2D Euler-Boussinesq system in C^γ(R×T^2) × C^γ(R×T^2) that violate conservation of the temperature's L^p-norm.

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