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man pages->IRIX man pages -> complib/sorgl2 (3)
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### Contents

```
SORGL2(3F)							    SORGL2(3F)

```

### NAME[Toc][Back]

```     SORGL2 - generate an m by n real matrix Q with orthonormal	rows,
```

### SYNOPSIS[Toc][Back]

```     SUBROUTINE	SORGL2(	M, N, K, A, LDA, TAU, WORK, INFO )

INTEGER	INFO, K, LDA, M, N

REAL		A( LDA,	* ), TAU( * ), WORK( * )
```

### PURPOSE[Toc][Back]

```     SORGL2 generates an m by n	real 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 SGELQF.

```

### ARGUMENTS[Toc][Back]

```     M	     (input) INTEGER
The number	of rows	of the matrix Q. M >= 0.

N	     (input) INTEGER
The number	of columns of the matrix Q. N >= M.

K	     (input) INTEGER
The number	of elementary reflectors whose product defines the
matrix Q. M >= K >= 0.

A	     (input/output) REAL array,	dimension (LDA,N)
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
SGELQF in the first k rows	of its array argument A.  On exit, the
m-by-n matrix Q.

LDA     (input) INTEGER
The first dimension of the	array A. LDA >=	max(1,M).

TAU     (input) REAL array, dimension (K)
TAU(i) must contain the scalar factor of the elementary reflector
H(i), as returned by SGELQF.

WORK    (workspace) REAL array, dimension (M)

INFO    (output) INTEGER
= 0: successful exit
< 0: if INFO = -i,	the i-th argument has an illegal value
SORGL2(3F)							    SORGL2(3F)

```

### NAME[Toc][Back]

```     SORGL2 - generate an m by n real matrix Q with orthonormal	rows,
```

### SYNOPSIS[Toc][Back]

```     SUBROUTINE	SORGL2(	M, N, K, A, LDA, TAU, WORK, INFO )

INTEGER	INFO, K, LDA, M, N

REAL		A( LDA,	* ), TAU( * ), WORK( * )
```

### PURPOSE[Toc][Back]

```     SORGL2 generates an m by n	real 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 SGELQF.

```

### ARGUMENTS[Toc][Back]

```     M	     (input) INTEGER
The number	of rows	of the matrix Q. M >= 0.

N	     (input) INTEGER
The number	of columns of the matrix Q. N >= M.

K	     (input) INTEGER
The number	of elementary reflectors whose product defines the
matrix Q. M >= K >= 0.

A	     (input/output) REAL array,	dimension (LDA,N)
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
SGELQF in the first k rows	of its array argument A.  On exit, the
m-by-n matrix Q.

LDA     (input) INTEGER
The first dimension of the	array A. LDA >=	max(1,M).

TAU     (input) REAL array, dimension (K)
TAU(i) must contain the scalar factor of the elementary reflector
H(i), as returned by SGELQF.

WORK    (workspace) REAL array, dimension (M)

INFO    (output) INTEGER
= 0: successful exit
< 0: if INFO = -i,	the i-th argument has an illegal value

PPPPaaaaggggeeee 1111```
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