We used the relationship of the Riemann symmetric space and the symmetric algebra, a matrix inequality to provided a estimate sectional curvature of a complex manifold.

利用黎曼对称空间同正交对称李代数之间的密切关系及一个矩阵不等式给出了一个复流形上截面曲率的上界的精确估计。

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This paper characterizes symmetric ternary cellular automata (CA -3) with the help of matrix algebra.

本文提出对称三值系统中的元胞自动机(CA - 3)的特征化表示方法。

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