1Matrix3d m = Matrix3d::Random();
2cout << "Here is the matrix m:" << endl << m << endl;
3Matrix3d inverse;
4bool invertible;
5m.computeInverseWithCheck(inverse,invertible);
6if(invertible) {
7  cout << "It is invertible, and its inverse is:" << endl << inverse << endl;
8}
9else {
10  cout << "It is not invertible." << endl;
11}
12