By the fractional method, characterized the linear preservers of the adjoint function on the symmetric matrix module.
应用分式化方法刻画了唯一分解环上对称矩阵模的保持伴随函数的线性变换的形式。
The method to calculate principal axes of inertia by adjoint matrix of eigen matrix is given, examples are presented.
本文给出了用特征矩阵的伴随矩阵求惯量主轴的代数方法，并通过实例作了说明。
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