a flexible preconditioned arnoldi method for shifted linear systems
g.-d. gu department of applied mathematics; shanghai university of finance and economics; shanghai 200433; china x.-l. zhou and lei lin department of mathematics; shanghai university; shanghai 200436; china

..............page:522-530

optimal approximate solution of the matrix equation axb = c over symmetric matrices
anping liao and yuan lei college of mathematics and econometrics; hunan university; changsha 410082; china

..............page:543-552

an inverse eigenvalue problem for jacobi matrices
haixia liang and erxiong jiang department of mathematics; shanghai university; shanghai 200444; china

..............page:620-630

incremental unknowns for the heat equation with time-dependent coefficients: semi-implicit -schemes and their stability
yujiang wu and aili yang school of mathematics and statistics; lanzhou university; lanzhou 730000; china

..............page:573-582

a numerically stable block modified gram-schmidt algorithm for solving stiff weighted least squares problems
musheng wei department of mathematics; east china normal university; shanghai 200062; china qiaohua liu department of mathematics; shanghai university; shanghai 200444; china

..............page:595-619

condition number for weighted linear least squares problem
yimin wei school of mathematical sciences and key laboratory of mathematics for nonlinear sciences; fudan university; shanghai 200433; china huaian diao department of mathematics; the city university of hong kong; 83 tat chee avenue; kowloon; hong kong sanzheng qiao department of computing and software; mcmaster university; hamilton; ontario; l8s 4l7; canada

..............page:561-572

structures of circulant inverse m-matrices
yurui lin school of computer and information science; fujian agriculture and forestry university; china linzhang lu school of mathematics and computer science; guizhou normal university; guiyang 550001; china and school of mathematical science; xiamen university; xiamen 361005; china

..............page:553-560

a qr decomposition based solver for the least squares problems from the minimal residual method for the sylvester equation
zhongxiao jia and yuquan sun department of mathematical sciences; tsinghua university; beijing 100084; china

..............page:531-542

on the rayleigh quotient for singular values
xiaoshan chen and wen li school of mathematical sciences; south china normal university; guangzhou 510631; china

..............page:512-521

modified bernoulli iteration methods for quadratic matrix equation
zhong-zhi bai and yong-hua gao lsec; icmsec; academy of mathematics and system sciences; chinese academy of sciences; beijing 100080; china

..............page:498-511

fast parallelizable methods for computing invariant subspaces of hermitian matrices
zhenyue zhang department of mathematics; zhejiang university; hangzhou 310027; china hongyuan zha college of computing; georgia institute of technology atlanta; ga 30332; usa wenlong ying department of mathematics; zhejiang university; hangzhou 310027; china

..............page:583-594