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{he,sy}td2: reduction to tridiagonal, level 2
LAPACK » Hermitian/symmetric eigenvalues » Eig computational routines
Collaboration diagram for {he,sy}td2: reduction to tridiagonal, level 2:

## Functions

subroutine | chetd2 (uplo, n, a, lda, d, e, tau, info)
| CHETD2 reduces a Hermitian matrix to real symmetric tridiagonal form by an unitary similarity transformation (unblocked algorithm).
subroutine | dsytd2 (uplo, n, a, lda, d, e, tau, info)
| DSYTD2 reduces a symmetric matrix to real symmetric tridiagonal form by an orthogonal similarity transformation (unblocked algorithm).
subroutine | ssytd2 (uplo, n, a, lda, d, e, tau, info)
| SSYTD2 reduces a symmetric matrix to real symmetric tridiagonal form by an orthogonal similarity transformation (unblocked algorithm).
subroutine | zhetd2 (uplo, n, a, lda, d, e, tau, info)
| ZHETD2 reduces a Hermitian matrix to real symmetric tridiagonal form by an unitary similarity transformation (unblocked algorithm).

## Detailed Description