public void InvertMat()
{
CSqMatrix mat = new CSqMatrix(new Complex[, ] {
{ 11, 12, 4 },
{ 0, 9, 30 },
{ 40, 5, 3 }
});
double n1 = (mat.Invert() * mat - SqMatrix.E(3)).CubeNorm;
n1.Show();
double n2 = (mat.InvertSum * mat - SqMatrix.E(3)).CubeNorm;
n2.Show();
Assert.IsTrue(n1 <= 1e-6 && n2 <= 1e-6);
}
