The symplectic conservative perturbation for a transfer symplectic matrix should be based on the canonical transformation method.
辛矩阵只能在乘法群下保辛，故传递辛矩阵的保辛摄动必须采用正则变换的乘法。
Perturbation analysis of the canonical subspaces: This paper gives the least perturbation bound of the unitary factor on the unitary decomposition.
标准子空间的扰动分析：本文给出了矩阵的酉分解中酉因子的最小扰动界。
The canonical transformation method is proposed for symplectic conservative perturbation approximation.
然后给出正则变换的摄动保辛方法。
The canonical transformation method is proposed for symplectic conservative perturbation approximation.
然后给出正则变换的摄动保辛方法。
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