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Fix shadow variable, and indexing.

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This commit is contained in:
Gael Guennebaud 2016-06-09 16:16:22 +02:00
parent 0beabb4776
commit a20d2ec1c0
1 changed files with 7 additions and 7 deletions
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14
Eigen/src/Eigenvalues/GeneralizedEigenSolver.h
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@ -339,17 +339,17 @@ GeneralizedEigenSolver<MatrixType>::compute(const MatrixType& A, const MatrixTyp
RealScalar e = m_matS.coeff(i, i), f = m_matS.coeff(i, i+1), g = m_matS.coeff(i+1, i), h = m_matS.coeff(i+1, i+1);
RealScalar d = c-a;
RealScalar gb = g*b;
Matrix<RealScalar,2,2> A;
A << (e*d-gb)*c, ((e*b+f*d-h*b)*d-gb*b)*a,
g*c , (gb+h*d)*a;
Matrix<RealScalar,2,2> S2;
S2 << (e*d-gb)*c, ((e*b+f*d-h*b)*d-gb*b)*a,
g*c , (gb+h*d)*a;
// NOTE, we could also compute the SVD of T's block during the QZ factorization so that the respective T block is guaranteed to be diagonal,
// and then we could directly apply the formula below (while taking care of scaling S columns by T11,T00):
Scalar p = Scalar(0.5) * (A.coeff(i, i) - A.coeff(i+1, i+1));
Scalar z = sqrt(abs(p * p + A.coeff(i+1, i) * A.coeff(i, i+1)));
m_alphas.coeffRef(i) = ComplexScalar(A.coeff(i+1, i+1) + p, z);
m_alphas.coeffRef(i+1) = ComplexScalar(A.coeff(i+1, i+1) + p, -z);
Scalar p = Scalar(0.5) * (S2.coeff(0,0) - S2.coeff(1,1));
Scalar z = sqrt(abs(p * p + S2.coeff(1,0) * S2.coeff(0,1)));
m_alphas.coeffRef(i) = ComplexScalar(S2.coeff(1,1) + p, z);
m_alphas.coeffRef(i+1) = ComplexScalar(S2.coeff(1,1) + p, -z);
m_betas.coeffRef(i) =
m_betas.coeffRef(i+1) = a*c*d;