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arXiv 1609.02691math.AP
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具有临界发散自由漂移的分数阶抛物型方程的Hölder估计

Hölder estimates for fractional parabolic equations with critical divergence free drifts

Matias G. Delgadino, Scott Smith

摘要:

本文主要研究了具有分数阶耗散项的漂移扩散方程的$(-Δ)^α$.我们的主要结果是一个先验的Hölder估计光滑解的柯西问题,从初始数据与有限的能量。我们证明了对于某些$β\in (0,1)$,解的$C^β$范数只依赖于具有$q>2$和$γ\in (0,2α-1]$的$L^{q}_{t}(BMO^{-γ}_{x})$形式的临界空间中漂移的大小,以及初始数据的$L^{2}_{x}$范数.证明使用的Caffarelli/Vasseur变种德Giorgi的方法非本地方程。

英文摘要:

This work focuses on drift-diffusion equations with fractional dissipation $(-Δ)^α$ in the regime $α\in (1/2,1)$. Our main result is an a priori Hölder estimate on smooth solutions to the Cauchy problem, starting from initial data with finite energy. We prove that for some $β\in (0,1)$, the $C^β$ norm of the solution depends only on the size of the drift in critical spaces of the form $L^{q}_{t}(BMO^{-γ}_{x})$ with $q>2$ and $γ\in (0,2α-1]$, along with the $L^{2}_{x}$ norm of the initial datum. The proof uses the Caffarelli/Vasseur variant of De Giorgi's method for non-local equations.

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