The invariant space has to be as well a deformation of a classical space, a deformation that makes it noncommutative.
这些不变的空间同样也是经典空间的变形，它们通过这种变形成为非对易空间。
The method of invariant eigen-operator is generalized to the classical system, and the normal coordinate of system is also obtained by using this method.
将不变本征算符方法推广到经典体系，并利用它来求体系的简正坐标。
The working mechanism of classical ICP algorithm is deeply studied, and its advantages and limits are analyzed. Registration based on angular-invariant is then proposed.
深入研究了经典ICP算法的工作原理，分析了ICP算法的优点和局限性，进而提出了基于角特征不变量的配准算法。
In Chapter 4, we focus on the structure of the rational invariant fields of the maximal subgroups and root subgroups of finite classical groups.
第四章在有限典型群的极大子群和根子群的有理不变式域方面做了一些讨论。
Compared with the classical Lie method, it adds an invariant surface condition in the formation. Consequently, it makes calculation easy and obtains more group-invariant solutions.
非古典对称方法在经典的李对称方法的基础上添加了初始方程的表面不变条件，从而既简化了计算，又有助于得到更多的对称及群不变解。
Compared with the classical Lie method, it adds an invariant surface condition in the formation. Consequently, it makes calculation easy and obtains more group-invariant solutions.
非古典对称方法在经典的李对称方法的基础上添加了初始方程的表面不变条件，从而既简化了计算，又有助于得到更多的对称及群不变解。
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