摘要
本文为一篇综述文章,主要回顾中外数学家在可压缩和不可压缩弹性力学方程平衡态附近经典解的整体适定性方面所取得的关键研究成果.由于这里所涉及的研究思想和方法与研究拟线性波动方程相应问题的思想和方法密切相关,因此也将回顾拟线性波动方程的一些相应问题的理论和研究方法.本文将尽可能简单明了地指出各研究课题的关键困难及克服它们的基本想法,并对其中大部分关键成果给予更为直截了当的证明.本文还将提出几个公开问题并简单讨论其困难所在,以期向更年轻的专家学者抛砖引玉.
This is a survey paper. We mainly revisit those highlighted results on the global well-posedness of classical solutions near equilibrium for systems of compressible and incompressible elasticity. Due to the fact that the methods and ideas used for elasticity are closely related to those used for quasilinear wave equations, we will also revisit some corresponding highlighted results on quasilinear wave equations. We will try to pinpoint the key difficulties of those problems and the key methods to overcome them, and present direct and simple proofs as many as we can. We will also raise some open questions and make a few comments to attract the attention of young researchers.
引文
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1)由于不可压缩条件的限制,此时的弹性力学方程仍然是非线性的.
2 )在不可压缩情形时需要用到文献[11, 12]中发现的恒等式.
3)i、j和k也可以取值于{0, 1, 2,..., n},?0=?t.请读者自行对证明作适当的改动.
4 )这里对尺度变换算子作了少许改动以使后面的陈述及运算更简便.
5)众所周知,二维情形Hardy不等式∥r-1f∥L2∥?f∥L2是不成立的.
6 )系数Cijk中的指标一定是成对出现的lmn.
7)在广义能量Es的定义中只需要一个时空导数.