两个矩阵分离度的界

Bounds about the separation of two matrices

给出了两个矩阵的分离度的上、下界，其界与矩阵的特征值、Ｊｏｒｄａｎ块的阶数及条件数有关，数值例子表明所得的界限较已往的结果要好．

he upper and lower bounds about the separation of two matrices are given. They have relation to the eigenvalues,orders of Jordan blocks and condition numbers of the associate two matrices.Numerical tests show that the new bounds one very accurate and better than previous result