文摘
弱非线性双曲型方程的理论是发达国家在过去的十年以惊人的方式。今天我们有一个很好的概述关于假设保证当地posedness在空间的光滑函数
, Gevrey). But the situation is completely unclear in the case of Sobolev spaces. Examples from the linear theory show that in opposite to the strictly hyperbolic case we have in general no solutions valued in Sobolev spaces. If so-called Levi conditions are satisfied, then the situation will
be better. Using sharp Levi conditions of
弱非线性双曲型方程的理论是发达国家在过去的十年以惊人的方式。今天我们有一个很好的概述关于假设保证当地posedness在空间的光滑函数