Improved Qrginv Algorithm for Computing Moore-Penrose Inverse Matrices

Table 8

Error and computational time results for hilb (rank = 20, cond = 4.4158𝑒+021).

Method	Time	‖𝐴𝐴^†𝐴−𝐴‖2	‖𝐴^†𝐴𝐴^†−𝐴^†‖2	‖(𝐴𝐴^†)^𝑇−(𝐴𝐴^†)‖2	‖(𝐴^†𝐴)^𝑇−(𝐴^†𝐴)‖2
qrginv	0.0247	7.7880𝑒−006	1.1444𝑒−008	1.0053𝑒−001	5.5974𝑒−012
IMqrginv	0.0117	7.7880𝑒−006	1.1184𝑒−008	1.0053𝑒−001	5.5636𝑒−012