# derred.f - Man Page

TESTING/EIG/derred.f

## Synopsis

### Functions/Subroutines

subroutine **derred** (path, nunit)**DERRED**

## Function/Subroutine Documentation

### subroutine derred (character*3 path, integer nunit)

**DERRED**

**Purpose:**

DERRED tests the error exits for the eigenvalue driver routines for DOUBLE PRECISION matrices: PATH driver description ---- ------ ----------- SEV DGEEV find eigenvalues/eigenvectors for nonsymmetric A SES DGEES find eigenvalues/Schur form for nonsymmetric A SVX DGEEVX SGEEV + balancing and condition estimation SSX DGEESX SGEES + balancing and condition estimation DBD DGESVD compute SVD of an M-by-N matrix A DGESDD compute SVD of an M-by-N matrix A (by divide and conquer) DGEJSV compute SVD of an M-by-N matrix A where M >= N DGESVDX compute SVD of an M-by-N matrix A(by bisection and inverse iteration) DGESVDQ compute SVD of an M-by-N matrix A(with a QR-Preconditioned )

**Parameters***PATH*PATH is CHARACTER*3 The LAPACK path name for the routines to be tested.

*NUNIT*NUNIT is INTEGER The unit number for output.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **69** of file **derred.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page derred(3) is an alias of derred.f(3).

Tue Nov 28 2023 12:08:42 Version 3.12.0 LAPACK