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| 1 | MatrixXcd X = MatrixXcd::Random(4,4);
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| 2 | MatrixXcd A = X + X.adjoint();
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| 3 | cout << "Here is a random self-adjoint 4x4 matrix:" << endl << A << endl << endl;
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| 4 |
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| 5 | Tridiagonalization<MatrixXcd> triOfA(A);
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| 6 | MatrixXd T = triOfA.matrixT();
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| 7 | cout << "The tridiagonal matrix T is:" << endl << T << endl << endl;
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| 8 |
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| 9 | cout << "We can also extract the diagonals of T directly ..." << endl;
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| 10 | VectorXd diag = triOfA.diagonal();
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| 11 | cout << "The diagonal is:" << endl << diag << endl;
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| 12 | VectorXd subdiag = triOfA.subDiagonal();
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| 13 | cout << "The subdiagonal is:" << endl << subdiag << endl;
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