cgerqs3

!>
!> Compute a minimum-norm solution
!>     min || A*X - B ||
!> using the RQ factorization
!>     A = R*Q
!> computed by CGERQF.
!> 

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
!> 

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