关于M方阵A与A^（－1）的积A°A^（－1）的注记

A NOTE TO THE PRODUCT A°A￣(-1) OF M MATRIX A AND ITS INVERSE A￣(-1)

给出了Ｍ方阵Ａ与其逆方阵Ａ－１的Ｈａｄａｍａｒｄ积ＡＡ－１的最小特征值ｑ（ＡＡ－１）的一个下界．

This Paper gives out a lower bound for the smallest eigenvalue q(A A-1) of Hadamard product A A-1 of M matrix A and its inverse A-1.