LAPACK
3.6.1
LAPACK: Linear Algebra PACKage
|
subroutine zgerqs | ( | integer | M, |
integer | N, | ||
integer | NRHS, | ||
complex*16, dimension( lda, * ) | A, | ||
integer | LDA, | ||
complex*16, dimension( * ) | TAU, | ||
complex*16, dimension( ldb, * ) | B, | ||
integer | LDB, | ||
complex*16, dimension( lwork ) | WORK, | ||
integer | LWORK, | ||
integer | INFO | ||
) |
ZGERQS
Compute a minimum-norm solution min || A*X - B || using the RQ factorization A = R*Q computed by ZGERQF.
[in] | M | M is INTEGER The number of rows of the matrix A. M >= 0. |
[in] | N | N is INTEGER The number of columns of the matrix A. N >= M >= 0. |
[in] | NRHS | NRHS is INTEGER The number of columns of B. NRHS >= 0. |
[in] | A | A is COMPLEX*16 array, dimension (LDA,N) Details of the RQ factorization of the original matrix A as returned by ZGERQF. |
[in] | LDA | LDA is INTEGER The leading dimension of the array A. LDA >= M. |
[in] | TAU | TAU is COMPLEX*16 array, dimension (M) Details of the orthogonal matrix Q. |
[in,out] | B | B is COMPLEX*16 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. |
[in] | LDB | LDB is INTEGER The leading dimension of the array B. LDB >= max(1,N). |
[out] | WORK | WORK is COMPLEX*16 array, dimension (LWORK) |
[in] | 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. |
[out] | INFO | INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value |
Definition at line 124 of file zgerqs.f.