matrix product

• 矩阵积

matrix product的用法和样例：

例句

1. 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。