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。
2
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。
3
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.