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On well-posedness of α-SQG equations in the half-plane

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arxiv 2305.04300 v1 pith:3TYY5JQN submitted 2023-05-07 math.AP

On well-posedness of α-SQG equations in the half-plane

classification math.AP
keywords alphawell-posednessequationsolderhalf-planeproveanisotropicboundary
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We investigate the well-posedness of $\alpha$-SQG equations in the half-plane, where $\alpha=0$ and $\alpha=1$ correspond to the 2D Euler and SQG equations respectively. For $0<\alpha \le 1/2$, we prove local well-posedness in certain weighted anisotropic H\"older spaces. We also show that such a well-posedness result is sharp: for any $0<\alpha \le 1$, we prove nonexistence of H\"older regular solutions (with the H\"older regularity depending on $\alpha$) for initial data smooth up to the boundary.

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