dorsal/arxiv
View SchemaNon-conservation of a generalized helicity in the Euler equations
| Authors | Vikram Giri, Hyunju Kwon, Matthew Novack |
|---|---|
| Categories | |
| ArXiv ID | 2601.05869vv1 |
| URL | https://arxiv.org/abs/2601.05869 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
For a $C^1_{t,x}$ solution $u$ to the incompressible 3D Euler equations, the helicity $H(u(t))=\int_{\mathbb{T}^3} u \cdot \textrm{curl}\, u$ is constant in time. For general low-regularity weak solutions, it is not always clear how to define the helicity, or whether it must be constant in time in the case that there is a clear definition. In this paper, we define a generalized helicity which extends the classical definitions and construct weak solutions of Euler of almost Onsager-critical regularity in $L^3$ with prescribed generalized helicity and kinetic energy.
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"date_created": "2026-02-17T05:53:04.833000Z",
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"abstract": "For a $C^1_{t,x}$ solution $u$ to the incompressible 3D Euler equations, the helicity $H(u(t))=\\int_{\\mathbb{T}^3} u \\cdot \\textrm{curl}\\, u$ is constant in time. For general low-regularity weak solutions, it is not always clear how to define the helicity, or whether it must be constant in time in the case that there is a clear definition. In this paper, we define a generalized helicity which extends the classical definitions and construct weak solutions of Euler of almost Onsager-critical regularity in $L^3$ with prescribed generalized helicity and kinetic energy.",
"arxiv_id": "2601.05869",
"authors": [
"Vikram Giri",
"Hyunju Kwon",
"Matthew Novack"
],
"categories": [
"math.AP"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Non-conservation of a generalized helicity in the Euler equations",
"url": "https://arxiv.org/abs/2601.05869",
"version": "v1"
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