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arXiv 2408.05067math.AP
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临界空间中具有超线性非线性的拟线性抛物方程

Quasilinear parabolic equations with superlinear nonlinearities in critical spaces

Bogdan-Vasile Matioc, Luigi Roberti, Christoph Walker

AI总结:

本文在临界空间中研究具有超线性非线性的拟线性抛物方程的适定性,利用抛物正则化效应建立半流,并通过大气流动等例子验证结果。

摘要:

在时间加权空间中,对于拟线性(及半线性)抛物型发展方程 $u'=A(u)u+f(u)$,在超线性函数 $u\mapsto f(u)$ 与拟线性部分 $u\mapsto A(u)$ 的定义域满足严格包含关系 $\mathrm{dom}(f)\subsetneq \mathrm{dom}(A)$ 的特定临界情形下,建立了适定性。基于抛物方程的正则化效应,证明了解映射在临界中间空间中生成一个半流。通过若干例子展示了抽象结果的适用性,包括一个大气流动模型以及具有标度不变性的半线性和拟线性发展方程,在这些方程中,证明了在临界标度不变中间空间中的适定性。

英文摘要:

Well-posedness in time-weighted spaces for quasilinear (and semilinear) parabolic evolution equations $u'=A(u)u+f(u)$ is established in a certain critical case of strict inclusion $\mathrm{dom}(f)\subsetneq \mathrm{dom}(A)$ for the domains of the (superlinear) function $u\mapsto f(u)$ and the quasilinear part $u\mapsto A(u)$. Based upon regularizing effects of parabolic equations, it is proven that the solution map generates a semiflow in a critical intermediate space. The applicability of the abstract results is demonstrated by several examples including a model for atmospheric flows and semilinear and quasilinear evolution equations with scaling invariance for which well-posedness in the critical scaling invariant intermediate spaces is shown.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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