A universal Hölder estimate up to dimension 4 for stable solutions to half-Laplacian semilinear equations
A universal Hölder estimate up to dimension 4 for stable solutions to half-Laplacian semilinear equations
复制标题
半拉普拉斯半线性方程稳定解的通用 Hölder 估计高达 4 维
DOI:
10.1016/j.jde.2022.02.001
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发表时间:
2022
影响因子:
2.4
通讯作者:
Cabré X
中科院分区:
文献类型:
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作者:
Cabré X
We study stable solutions to the equation (− Δ) 1/2 u= f (u), posed in a bounded domain of R n. For nonnegative convex nonlinearities, we prove that stable solutions are smooth in dimensions n≤ 4. This result, which was known only for n= 1, follows from a new interior Hölder estimate that is completely independent of the nonlinearity f. A main ingredient in our proof is a new geometric form of the stability condition. It is still unknown for other fractions of the Laplacian and, surprisingly, it requires convexity of the nonlinearity. From it, we deduce higher order Sobolev estimates that allow us to extend the techniques developed by Cabré, Figalli, Ros-Oton, and Serra for the Laplacian. In this way we obtain, besides the Hölder bound for n≤ 4, a universal H 1/2 estimate in all dimensions. Our L∞ bound is expected to hold for n≤ 8, but this has been settled only in the radial case or when f (u)= λ e u. For other fractions of the Laplacian, the expected optimal dimension for boundedness of stable solutions has been reached only when f (u)= λ e u, even in the radial case.
DOI:
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发表时间:
2019
期刊:
Discrete and Continuous Dynamical Systems. Series A
影响因子:
--
作者:
Mostafa Fazly
通讯作者:
Mostafa Fazly
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
Tomás Sanz
通讯作者:
Tomás Sanz
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Tomás Sanz
通讯作者:
Tomás Sanz