Isett's generic energy-profile regularity conjecture for Hölder Euler flows

Let α<1/3\alpha<1/3. Consider weak periodic solutions of the incompressible Euler equations in the class vCtCxα(R×Tn)v\in C_tC_x^\alpha(\mathbb{R}\times\mathbb{T}^n), and define their energy profile by

e(t)=Tnv2(t,x)dx.e(t)=\int_{\mathbb{T}^n}|v|^2(t,x)\,dx.

Generic energy-profile regularity conjecture. A generic solution with regularity at most 1/31/3 fails to conserve energy and has an energy profile of minimal regularity. More precisely, for every α<1/3\alpha<1/3, there exists a solution such that

eW2α/(1α)+ϵ,p(I)e\notin W^{2\alpha/(1-\alpha)+\epsilon,p}(I)

for every ϵ>0\epsilon>0, p1p\geq1, and every open interval IRI\subseteq\mathbb{R}; moreover, the set of all such solutions is residual in the space of weak solutions in CtCxα(R×Tn)C_tC_x^\alpha(\mathbb{R}\times\mathbb{T}^n) endowed with the topology induced by the CtCxαC_tC_x^\alpha norm. This strengthens Onsager's conjecture by prescribing the sharp failure of energy-profile regularity; the source presents it as a main concern, and the parser supplies no evidence of resolution.

Sources & referencesView supporting material

Primary source

Philip Isett and Sung-Jin Oh, “On Nonperiodic Euler Flows with Hölder Regularity”, arXiv:1402.2305 (2015).

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