矩阵A+(b)的正定问题

THE POSITIVE DEFINITE THEOREM OF THE MATRIX A+(b)

本文给出并证明了正定矩阵的每一个元素都加上同一个数后仍然正定的充分必要条件。

If the matix A is positive definite , than the matrix A+(b) is positive definite too iff {||/|(1,)|}11>max ∑≤≤=?kknkj kjbAA