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May 6, 2022 at 6:09 vote accept Holden Lyu
Sep 10, 2021 at 3:55 comment added Holden Lyu @AlessandroDellaCorte Thank you anyway. It’s happy to discuss with you.
Sep 9, 2021 at 15:30 comment added Alessandro Della Corte Yeah, you're right.
Sep 9, 2021 at 15:10 answer added Mateusz Kwaśnicki timeline score: 4
Sep 9, 2021 at 13:11 history edited Alessandro Della Corte CC BY-SA 4.0
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Sep 9, 2021 at 9:42 comment added Holden Lyu @AlessandroDellaCorte I don’t think so. You may read a paper of Junyan Zheng. Or, you can consider an example that $y=|x|^{1+\alpha}$, which fits the condition of g, but you can see that there is no interior ball at (0,0)
Sep 9, 2021 at 9:35 comment added Alessandro Della Corte In the proof of Hopf Lemma, the smoothness of the boundary is used when claiming that there is a small ball contained in $\Omega$ whose closure is tangent to the boundary at $x$ and intersects the boundary only at $x$. But isn't this what the authors assume at the fourth line of Section 2? (although they should also have added that they keep the assumption $x_n>g(x')$ made in the fourth line of the Introduction).
Sep 9, 2021 at 9:18 comment added Holden Lyu @AlessandroDellaCorte But, as the boundary is $C^{1, \alpha}$, we cannot get the interior ball condition. How to use Hopf lemma here?
Sep 9, 2021 at 8:39 comment added Holden Lyu @AlessandroDellaCorte yes I do want to know how to get this condition. Did they claim it? I have no idea ever reading it… Could you please tell where they claimed it?
Sep 9, 2021 at 8:34 comment added Holden Lyu @AlessandroDellaCorte Yes it is the paper I’m reading. The other conditions doesn’t seem that essential. Could you please tell that where the claim $u_{\nu}$ is bounded? It seems that I’ve missed the condition.
Sep 9, 2021 at 8:34 comment added Alessandro Della Corte This is the paper, right? arxiv.org/pdf/1403.2588.pdf
Sep 9, 2021 at 7:35 history asked Holden Lyu CC BY-SA 4.0