the trace of matrix的用法和样例：
例句
- Strike is the trace of the intersection of an obliquely inclined plane with a horizontal reference plane.
走向是倾斜平面与水平参考成交线的迹线。 - We prove sime equivalence between the trace and the eigenvalue of the product of two matrices, then extend them to the case of the sum of two matrices.
摘要本文给出了两个矩阵积的迹与特徵值之间的若干等价关系，并推广到两回事个矩阵和的情形。
