sget40.f3
Usage
Functions/Subroutines
subroutine sget40 (rmax, lmax, ninfo, knt, nin)
SGET40
Function/Subroutine Documentation
subroutine sget40 (real rmax, integer lmax, integer, dimension( 2 ) ninfo, integer knt, integer nin)
SGET40
Purpose:
!> !> SGET40 tests STGEXC, 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, STGEXC 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 REAL !> 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 ) = STGEXC without accumulation returned INFO nonzero !> NINFO( 2 ) = STGEXC 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 sget40.f.