摘要
介绍了弱DB-矩阵的概念,利用不等式技巧给出了弱DB-矩阵‖A-1‖∞的上界和最小奇异值估计,通过数值例子与前人的结果进行比较,说明新结果的有效性.
Weakly DB-Matrices are firstly introduced and then estimation of infinity norm of inverse matrices and the smallest singular value of weakly DB-Matrices are presented by using the technology of inequality.Finally,by comparing the new estimations with the classical results,it is shown that the new estimations are effective.
出处
《哈尔滨师范大学自然科学学报》
CAS
2010年第4期40-43,共4页
Natural Science Journal of Harbin Normal University
基金
福建省教育厅项目(JB09228)
三明学院科研基金项目(B0826/Q)
三明学院优势学科基金项目(YSXK0603)
关键词
弱DB-矩阵
逆矩阵
行范数
奇异值
Weakly DB-matrices
Infinity norm
Inverse matrices
Singular value
