1 Matrix4i m = Matrix4i::Random();
2 cout << "Here is the matrix m:" << endl << m << endl;
3 cout << "Here is m.bottomLeftCorner<2,2>():" << endl;
4 cout << m.bottomLeftCorner<2,2>() << endl;
5 m.bottomLeftCorner<2,2>().setZero();
6 cout << "Now the matrix m is:" << endl << m << endl;
7