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arXiv 2103.11028math.AP
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一类非齐次退化单相问题的自由边界正则性

Free boundary regularity for a class of one-phase problems with non-homogeneous degeneracy

João Vítor da Silva, Giane C. Rampasso, Gleydson C. Ricarte, Hernán A. Vivas

摘要:

考虑一类由右手边非零的双退化完全非线性椭圆型偏微分方程控制的单相自由边界问题,它可以理解为非自治积分理论中某些双相泛函的模拟(非变分).通过简单的例子来说明,这种非线性问题在燃烧的数学理论中以及在某些火焰传播问题的研究中出现。在这样的环境中,我们证明了解决方案是Lipschitz连续的,他们履行一个非退化属性。此外,我们解决了Caffarelli的分类方案:平坦和Lipschitz自由边界是局部$C^{1, β}$的一些$0 < β(universal) < 1$。

英文摘要:

We consider a one-phase free boundary problem governed by doubly degenerate fully non-linear elliptic PDEs with non-zero right hand side, which should be understood as an analog (non-variational) of certain double phase functionals in the theory of non-autonomous integrals. By way of brief elucidating example, such non-linear problems in force appear in the mathematical theory of combustion, as well as in the study of some flame propagation problems. In such an environment we prove that solutions are Lipschitz continuous and they fulfil a non-degeneracy property. Furthermore, we address the Caffarelli's classification scheme: Flat and Lipschitz free boundaries are locally $C^{1, β}$ for some $0 < β(universal) < 1$.

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