Hölder Regularity up to the Boundary for Critical SQG on Bounded Domains

@article{Stokols2019HlderRU,
  title={H{\"o}lder Regularity up to the Boundary for Critical SQG on Bounded Domains},
  author={Logan F. Stokols and Alexis F. Vasseur},
  journal={Archive for Rational Mechanics and Analysis},
  year={2019},
  volume={236},
  pages={1543-1591}
}
We consider the dissipative SQG equation in bounded domains, first introduced by Constantin and Ignatova in 2016. We show global Hölder regularity up to the boundary of the solution, with a method based on the De Giorgi techniques. The boundary introduces several difficulties. In particular, the Dirichlet Laplacian is not translation invariant near the boundary, which leads to complications involving the Riesz transform. 

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