# dget40.f - Man Page

TESTING/EIG/dget40.f

## Synopsis

### Functions/Subroutines

subroutine **dget40** (rmax, lmax, ninfo, knt, nin)**DGET40**

## Function/Subroutine Documentation

### subroutine dget40 (double precision rmax, integer lmax, integer, dimension( 2 ) ninfo, integer knt, integer nin)

**DGET40**

**Purpose:**

DGET40 tests DTGEXC, a routine for swapping adjacent blocks (either 1 by 1 or 2 by 2) on the diagonal of a pencil in real generalized Schur form. Thus, DTGEXC computes an orthogonal matrices Q and Z such that Q' * ( [ A B ], [ D E ] ) * Z = ( [ C1 B1 ], [ F1 E1 ] ) ( [ 0 C ] [ F ] ) ( [ 0 A1 ] [ D1] ) where (C1,F1) is similar to (C,F) and (A1,D1) is similar to (A,D). Both (A,D) and (C,F) are assumed to be in standard form and (A1,D1) and (C1,F1) are returned with the same properties.

**Parameters***RMAX*RMAX is DOUBLE PRECISION Value of the largest test ratio.

*LMAX*LMAX is INTEGER Example number where largest test ratio achieved.

*NINFO*NINFO is INTEGER array, dimension (2) NINFO( 1 ) = DTGEXC without accumulation returned INFO nonzero NINFO( 2 ) = DTGEXC with accumulation returned INFO nonzero

*KNT*KNT is INTEGER Total number of examples tested.

*NIN*NIN is INTEGER Input logical unit number.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **84** of file **dget40.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dget40(3) is an alias of dget40.f(3).

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