Thus, the concept of reflection matrix is proposed and the mirror symmetry of spectral analysis for nonorthogonal function is revealed.
本文提出了反射阵的概念，揭示了非正交函数谱分析的镜像对称性。
2
A finite difference method in nonorthogonal curvilinear coordinate is used for the simulation of two dimensional electrostatic field. The computational formula is derived.
讨论了计算二维静电场的非正交有限差分算法，给出了数值计算公式。
3
Then we introduce the basics of the theory of frames, which intuitively correspond to over complete, non-orthogonal systems of basis functions.