1 Tridiagonalization<MatrixXf> tri;
2 MatrixXf X = MatrixXf::Random(4,4);
3 MatrixXf A = X + X.transpose();
4 tri.compute(A);
5 cout << "The matrix T in the tridiagonal decomposition of A is: " << endl;
6 cout << tri.matrixT() << endl;
7 tri.compute(2*A); // re-use tri to compute eigenvalues of 2A
8 cout << "The matrix T in the tridiagonal decomposition of 2A is: " << endl;
9 cout << tri.matrixT() << endl;
10