table of contents
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/cgerqs.f(3) | Library Functions Manual | /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/cgerqs.f(3) |
NAME¶
/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/cgerqs.f
SYNOPSIS¶
Functions/Subroutines¶
subroutine CGERQS (m, n, nrhs, a, lda, tau, b, ldb, work,
lwork, info)
CGERQS
Function/Subroutine Documentation¶
subroutine CGERQS (integer m, integer n, integer nrhs, complex, dimension( lda, * ) a, integer lda, complex, dimension( * ) tau, complex, dimension( ldb, * ) b, integer ldb, complex, dimension( lwork ) work, integer lwork, integer info)¶
CGERQS
Purpose:
!> !> Compute a minimum-norm solution !> min || A*X - B || !> using the RQ factorization !> A = R*Q !> computed by CGERQF. !>
Parameters
M
!> M is INTEGER !> The number of rows of the matrix A. M >= 0. !>
N
!> N is INTEGER !> The number of columns of the matrix A. N >= M >= 0. !>
NRHS
!> NRHS is INTEGER !> The number of columns of B. NRHS >= 0. !>
A
!> A is COMPLEX array, dimension (LDA,N) !> Details of the RQ factorization of the original matrix A as !> returned by CGERQF. !>
LDA
!> LDA is INTEGER !> The leading dimension of the array A. LDA >= M. !>
TAU
!> TAU is COMPLEX array, dimension (M) !> Details of the orthogonal matrix Q. !>
B
!> B is COMPLEX array, dimension (LDB,NRHS) !> On entry, the right hand side vectors for the linear system. !> On exit, the solution vectors X. Each solution vector !> is contained in rows 1:N of a column of B. !>
LDB
!> LDB is INTEGER !> The leading dimension of the array B. LDB >= max(1,N). !>
WORK
!> WORK is COMPLEX array, dimension (LWORK) !>
LWORK
!> LWORK is INTEGER !> The length of the array WORK. LWORK must be at least NRHS, !> and should be at least NRHS*NB, where NB is the block size !> for this environment. !>
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 120 of file cgerqs.f.
Author¶
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Version 3.12.0 | LAPACK |