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arXiv 1003.5995math.AP
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从准解析到谱隙数据的基尔霍夫方程

Kirchhoff equations from quasi-analytic to spectral-gap data

Marina Ghisi, Massimo Gobbino

摘要:

在一篇著名的论文(东京数学杂志1984)中,K. Nishihara证明了Kirchhoff方程在一类特殊的初始数据中的整体存在性,这类初始数据位于解析函数和Gevrey空间之间。这类定义的傅立叶分量的权重满足适当的凸性和可积性条件。在本文中,我们通过删除凸性约束,并通过取代西原的可积性条件,出现在通常的准解析函数的特征更简单的可积性条件。在凸性假设被删除后,所得到的理论揭示了与最近的一些全球存在结果的谱隙数据意想不到的连接。

英文摘要:

In a celebrated paper (Tokyo J. Math. 1984) K. Nishihara proved global existence for Kirchhoff equations in a special class of initial data which lies in between analytic functions and Gevrey spaces. This class was defined in terms of Fourier components with weights satisfying suitable convexity and integrability conditions. In this paper we extend this result by removing the convexity constraint, and by replacing Nishihara's integrability condition with the simpler integrability condition which appears in the usual characterization of quasi-analytic functions. After the convexity assumptions have been removed, the resulting theory reveals unexpected connections with some recent global existence results for spectral-gap data.

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