todo

该文件为c++的数学函数库!是一个非常有用的编程工具.它含有各种数学函数,为科学计算、工程应用等程序编写提供方便！

* Pretty print function

* Clean up the tests.

* Run tests where matrix tda != size2, note that tda is a physical
dimension and size2 is the number of columns in the matrix. This will
probably find a lot of bugs in the matrix logic.

* Matrix norms that can be calculated analytically, e.g. Frobenius, etc