SRC/zhetrs_aa.f(3) | Library Functions Manual | SRC/zhetrs_aa.f(3) |
NAME
SRC/zhetrs_aa.f
SYNOPSIS
Functions/Subroutines
subroutine zhetrs_aa (uplo, n, nrhs, a, lda, ipiv, b, ldb,
work, lwork, info)
ZHETRS_AA
Function/Subroutine Documentation
subroutine zhetrs_aa (character uplo, integer n, integer nrhs, complex*16, dimension( lda, * ) a, integer lda, integer, dimension( * ) ipiv, complex*16, dimension( ldb, * ) b, integer ldb, complex*16, dimension( * ) work, integer lwork, integer info)
ZHETRS_AA
Purpose:
!> !> ZHETRS_AA solves a system of linear equations A*X = B with a complex !> hermitian matrix A using the factorization A = U**H*T*U or !> A = L*T*L**H computed by ZHETRF_AA. !>
Parameters
UPLO
!> UPLO is CHARACTER*1 !> Specifies whether the details of the factorization are stored !> as an upper or lower triangular matrix. !> = 'U': Upper triangular, form is A = U**H*T*U; !> = 'L': Lower triangular, form is A = L*T*L**H. !>
N
!> N is INTEGER !> The order of the matrix A. N >= 0. !>
NRHS
!> NRHS is INTEGER !> The number of right hand sides, i.e., the number of columns !> of the matrix B. NRHS >= 0. !>
A
!> A is COMPLEX*16 array, dimension (LDA,N) !> Details of factors computed by ZHETRF_AA. !>
LDA
!> LDA is INTEGER !> The leading dimension of the array A. LDA >= max(1,N). !>
IPIV
!> IPIV is INTEGER array, dimension (N) !> Details of the interchanges as computed by ZHETRF_AA. !>
B
!> B is COMPLEX*16 array, dimension (LDB,NRHS) !> On entry, the right hand side matrix B. !> On exit, the solution matrix X. !>
LDB
!> LDB is INTEGER !> The leading dimension of the array B. LDB >= max(1,N). !>
WORK
!> WORK is COMPLEX*16 array, dimension (MAX(1,LWORK)) !>
LWORK
!> LWORK is INTEGER !> The dimension of the array WORK. !> If MIN(N,NRHS) = 0, LWORK >= 1, else LWORK >= 3*N-2. !> !> If LWORK = -1, then a workspace query is assumed; the routine !> only calculates the minimal size of the WORK array, returns !> this value as the first entry of the WORK array, and no error !> message related to LWORK is issued by XERBLA. !>
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 136 of file zhetrs_aa.f.
Author
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