cunglq
cunglq - generate an M-by-N complex matrix Q with orthonormal rows,
SUBROUTINE CUNGLQ( M, N, K, A, LDA, TAU, WORK, LWORK, INFO)
COMPLEX A(LDA,*), TAU(*), WORK(*)
INTEGER M, N, K, LDA, LWORK, INFO
SUBROUTINE CUNGLQ_64( M, N, K, A, LDA, TAU, WORK, LWORK, INFO)
COMPLEX A(LDA,*), TAU(*), WORK(*)
INTEGER*8 M, N, K, LDA, LWORK, INFO
SUBROUTINE UNGLQ( M, [N], [K], A, [LDA], TAU, [WORK], [LWORK], [INFO])
COMPLEX, DIMENSION(:) :: TAU, WORK
COMPLEX, DIMENSION(:,:) :: A
INTEGER :: M, N, K, LDA, LWORK, INFO
SUBROUTINE UNGLQ_64( M, [N], [K], A, [LDA], TAU, [WORK], [LWORK],
* [INFO])
COMPLEX, DIMENSION(:) :: TAU, WORK
COMPLEX, DIMENSION(:,:) :: A
INTEGER(8) :: M, N, K, LDA, LWORK, INFO
#include <sunperf.h>
void cunglq(int m, int n, int k, complex *a, int lda, complex *tau, int *info);
void cunglq_64(long m, long n, long k, complex *a, long lda, complex *tau, long *info);
cunglq generates an M-by-N complex matrix Q with orthonormal rows,
which is defined as the first M rows of a product of K elementary
reflectors of order N
Q = H(k)' . . . H(2)' H(1)'
as returned by CGELQF.
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* M (input)
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The number of rows of the matrix Q. M >= 0.
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* N (input)
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The number of columns of the matrix Q. N >= M.
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* K (input)
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The number of elementary reflectors whose product defines the
matrix Q. M >= K >= 0.
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* A (input/output)
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On entry, the i-th row must contain the vector which defines
the elementary reflector H(i), for i = 1,2,...,k, as returned
by CGELQF in the first k rows of its array argument A.
On exit, the M-by-N matrix Q.
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* LDA (input)
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The first dimension of the array A. LDA >= max(1,M).
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* TAU (input)
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TAU(i) must contain the scalar factor of the elementary
reflector H(i), as returned by CGELQF.
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* WORK (workspace)
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On exit, if INFO = 0, WORK(1) returns the optimal LWORK.
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* LWORK (input)
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The dimension of the array WORK. LWORK >= max(1,M).
For optimum performance LWORK >= M*NB, where NB is
the optimal blocksize.
If LWORK = -1, then a workspace query is assumed; the routine
only calculates the optimal 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.
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* INFO (output)
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