cung2r man page on Scientific

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```CUNG2R(1)		 LAPACK routine (version 3.2)		     CUNG2R(1)

NAME
CUNG2R - generates an m by n complex matrix Q with orthonormal columns,

SYNOPSIS
SUBROUTINE CUNG2R( M, N, K, A, LDA, TAU, WORK, INFO )

INTEGER	  INFO, K, LDA, M, N

COMPLEX	  A( LDA, * ), TAU( * ), WORK( * )

PURPOSE
CUNG2R  generates  an m by n complex matrix Q with orthonormal columns,
which is defined as the first n columns of a product  of	 k  elementary
reflectors of order m
Q	=  H(1) H(2) . . . H(k)
as returned by CGEQRF.

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

N       (input) INTEGER
The number of columns of the matrix Q. M >= N >= 0.

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

A       (input/output) COMPLEX array, dimension (LDA,N)
On entry, the i-th column must contain the vector which defines
the  elementary	reflector H(i), for i = 1,2,...,k, as returned
by CGEQRF in the first k columns 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) COMPLEX array, dimension (K)
TAU(i) must contain the scalar factor of the elementary reflecā
tor H(i), as returned by CGEQRF.

WORK    (workspace) COMPLEX array, dimension (N)

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

LAPACK routine (version 3.2)	 November 2008			     CUNG2R(1)
```
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