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| 1 | MatrixXd X = MatrixXd::Random(5,5);
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| 2 | MatrixXd A = X + X.transpose();
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| 3 | cout << "Here is a random symmetric 5x5 matrix:" << endl << A << endl << endl;
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| 4 |
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| 5 | VectorXd diag(5);
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| 6 | VectorXd subdiag(4);
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| 7 | internal::tridiagonalization_inplace(A, diag, subdiag, true);
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| 8 | cout << "The orthogonal matrix Q is:" << endl << A << endl;
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| 9 | cout << "The diagonal of the tridiagonal matrix T is:" << endl << diag << endl;
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| 10 | cout << "The subdiagonal of the tridiagonal matrix T is:" << endl << subdiag << endl;
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