ZRQT01 tests ZGERQF, which computes the RQ factorization of an m-by-n


 matrix A, and partially tests ZUNGRQ which forms the n-by-n


 orthogonal matrix Q.


 ZRQT01 compares R with A*Q', and checks that Q is orthogonal.

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 >= 0.

A

          A is COMPLEX*16 array, dimension (LDA,N)


          The m-by-n matrix A.

AF

          AF is COMPLEX*16 array, dimension (LDA,N)


          Details of the RQ factorization of A, as returned by ZGERQF.


          See ZGERQF for further details.

Q

          Q is COMPLEX*16 array, dimension (LDA,N)


          The n-by-n orthogonal matrix Q.

R

          R is COMPLEX*16 array, dimension (LDA,max(M,N))

LDA

          LDA is INTEGER


          The leading dimension of the arrays A, AF, Q and L.


          LDA >= max(M,N).

TAU

          TAU is COMPLEX*16 array, dimension (min(M,N))


          The scalar factors of the elementary reflectors, as returned


          by ZGERQF.

WORK

          WORK is COMPLEX*16 array, dimension (LWORK)

LWORK

          LWORK is INTEGER


          The dimension of the array WORK.

RWORK

          RWORK is DOUBLE PRECISION array, dimension (max(M,N))

RESULT

          RESULT is DOUBLE PRECISION array, dimension (2)


          The test ratios:


          RESULT(1) = norm( R - A*Q' ) / ( N * norm(A) * EPS )


          RESULT(2) = norm( I - Q*Q' ) / ( N * EPS )

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Univ. of California Berkeley

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