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latrd: step in hetrd
LAPACK » Hermitian/symmetric eigenvalues » Eig computational routines
Collaboration diagram for latrd: step in hetrd:

## Functions

subroutine | clatrd (uplo, n, nb, a, lda, e, tau, w, ldw)
| CLATRD reduces the first nb rows and columns of a symmetric/Hermitian matrix A to real tridiagonal form by an unitary similarity transformation.
subroutine | dlatrd (uplo, n, nb, a, lda, e, tau, w, ldw)
| DLATRD reduces the first nb rows and columns of a symmetric/Hermitian matrix A to real tridiagonal form by an orthogonal similarity transformation.
subroutine | slatrd (uplo, n, nb, a, lda, e, tau, w, ldw)
| SLATRD reduces the first nb rows and columns of a symmetric/Hermitian matrix A to real tridiagonal form by an orthogonal similarity transformation.
subroutine | zlatrd (uplo, n, nb, a, lda, e, tau, w, ldw)
| ZLATRD reduces the first nb rows and columns of a symmetric/Hermitian matrix A to real tridiagonal form by an unitary similarity transformation.

## Detailed Description