Krylov.m

Error(s), warning(s):

warning: matrix singular to machine precision, rcond = 2.77995e-18
warning: called from
    source_file_rextester.m at line 8 column 6

resid =

 Columns 1 through 6:

   1.1062e+00   3.4916e-01   8.2537e-02   1.5023e-02   2.0387e-03   2.0386e-03

 Column 7:

   2.0384e-03

xm =

   4.5161e+00
  -8.0351e+01
   2.6449e+02
  -9.7097e+01
  -2.7637e+02
  -1.1597e+02
   3.3162e+02

A*xm
   9.9999e-01
   9.9987e-01
   1.0007e+00
   9.9875e-01
   1.0002e+00
   1.0012e+00
   9.9922e-01
bicgstab stopped at iteration 20 without converging to the desired toleranc 1.000000e-12
because the maximum number of iterations was reached.
The iterate returned (number 20) has relative residual 9.193239e-08
xm =

   7.0169e+00
  -3.3668e+02
   3.7866e+03
  -1.6826e+04
   3.4697e+04
  -3.3305e+04
   1.2026e+04

res =    2.4323e-07