table of contents
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/MATGEN/zlagsy.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/MATGEN/zlagsy.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/MATGEN/zlagsy.f
SYNOPSIS¶
Functions/Subroutines¶
subroutine ZLAGSY (n, k, d, a, lda, iseed, work, info)
ZLAGSY
Function/Subroutine Documentation¶
subroutine ZLAGSY (integer n, integer k, double precision, dimension( * ) d, complex*16, dimension( lda, * ) a, integer lda, integer, dimension( 4 ) iseed, complex*16, dimension( * ) work, integer info)¶
ZLAGSY
Purpose:
!> !> ZLAGSY generates a complex symmetric matrix A, by pre- and post- !> multiplying a real diagonal matrix D with a random unitary matrix: !> A = U*D*U**T. The semi-bandwidth may then be reduced to k by !> additional unitary transformations. !>
Parameters
N
!> N is INTEGER !> The order of the matrix A. N >= 0. !>
K
!> K is INTEGER !> The number of nonzero subdiagonals within the band of A. !> 0 <= K <= N-1. !>
D
!> D is DOUBLE PRECISION array, dimension (N) !> The diagonal elements of the diagonal matrix D. !>
A
!> A is COMPLEX*16 array, dimension (LDA,N) !> The generated n by n symmetric matrix A (the full matrix is !> stored). !>
LDA
!> LDA is INTEGER !> The leading dimension of the array A. LDA >= N. !>
ISEED
!> ISEED is INTEGER array, dimension (4) !> On entry, the seed of the random number generator; the array !> elements must be between 0 and 4095, and ISEED(4) must be !> odd. !> On exit, the seed is updated. !>
WORK
!> WORK is COMPLEX*16 array, dimension (2*N) !>
INFO
!> INFO is INTEGER !> = 0: successful exit !> < 0: if INFO = -i, the i-th argument had an illegal value !>
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 101 of file zlagsy.f.
Author¶
Generated automatically by Doxygen for LAPACK from the source code.
Version 3.12.0 | LAPACK |