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arXiv 1401.2623math.AP
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两相Stefan问题的一个定量的modulus of continuity

A quantitative modulus of continuity for the two-phase Stefan problem

Paolo Baroni, Tuomo Kuusi, José Miguel Urbano

摘要:

我们推导出定量的连续模$$ ω(r)=\left[ p+\ln \left( \frac{r_0}{r} \right) \right]^{-α(n,p)}, $$,我们猜想是最佳的,为解决方案的$p$退化两相Stefan问题。即使在经典的情况下$p=2$,这也代表了相对于1984年DiBenedetto和Friedman的最新结果的双重改进[J. reine angew.数学、1984],在这个意义上,我们放弃了一个对数迭代,并获得一个显式值的指数$α(n,p)$。

英文摘要:

We derive the quantitative modulus of continuity $$ ω(r)=\left[ p+\ln \left( \frac{r_0}{r} \right) \right]^{-α(n,p)}, $$ which we conjecture to be optimal, for solutions of the $p$-degenerate two-phase Stefan problem. Even in the classical case $p=2$, this represents a twofold improvement with respect to the 1984 state-of-the-art result by DiBenedetto and Friedman [J. reine angew. Math., 1984], in the sense that we discard one logarithm iteration and obtain an explicit value for the exponent $α(n,p)$.

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