1Matrix3f A = Matrix3f::Random(3,3), B;
2B << 0,1,0,
3     0,0,1,
4     1,0,0;
5cout << "At start, A = " << endl << A << endl;
6A.applyOnTheLeft(B);
7cout << "After applyOnTheLeft, A = " << endl << A << endl;
8