Problem inverting complex matrix

[Joe Horn]

(12-21-2019 01:02 PM)parisse Wrote:  inv calls the CAS, which works better with exact data. You can run approx(inv(exact(...))). If you want me to make a more complete diagnostic, please paste your input as plain text (other formats are more complicated to handle), using the following syntax (replace ... by appropriate data):
m1:=[[0.0005,0,...],[...]]; inv(m1);

Here's his matrix in plain-text format, for easy copy & paste:

M1:=[[0.0005,0,0,-0.0005,0,0,0,1],[0,9.69696969697E-4+0.00125*i,0,-0.00125*i,-6.66666666667E-4,-3.0303030303E-4,0,0],[0,0,3.57142857143E-4-0.0025*i,0,0.0025*i,0,-3.57142857143E-4,0],[-0.0005,-0.00125*i,0,0.0005+0.00125*i,0,0,0,0],[0,-6.66666666667E-4,0.0025*i,0,6.66666666667E-4-0.0025*i,0,0,0],[0,-3.0303030303E-4,0,0,0,3.0303030303E-4-1.66666666667E-3*i,0,0],[0,0,-3.57142857143E-4,0,0,0,3.57142857143E-4+0.005*i,0],[1,0,0,0,0,0,0,0]]