According to the law which is how the element density matrix is integrated into overall density matrix, this paper put forward the concept of matrix coordinate method;

根据单元力密度矩阵集成整体力密度矩阵的规律，提出了矩阵坐标法的概念；

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We bring about the concept of matrix continued roots, discuss the properties of matrix continued roots, and obtain some results for the convergence of the matrix continued roots.

提出了矩阵连根式的概念，研究了矩阵连根式的性质，获得了关于矩阵连根式序列收敛性的一些结。

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Multilinear central polynomials play a very important role in PI-theory. Introduce the concept of matrix sequence and k-commutator and study the multilinear central polynomials of matrix rings.

多重线性中心多项式在PI—环论研究中扮演了一个非常重要的角色。引入矩阵序列及m次换位子的概念研究了矩阵环的多重线性中心多项式。

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