cung2r.f (3)  Linux Manuals
NAME
cung2r.f 
SYNOPSIS
Functions/Subroutines
subroutine cung2r (M, N, K, A, LDA, TAU, WORK, INFO)
CUNG2R
Function/Subroutine Documentation
subroutine cung2r (integerM, integerN, integerK, complex, dimension( lda, * )A, integerLDA, complex, dimension( * )TAU, complex, dimension( * )WORK, integerINFO)
CUNG2R
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.
Parameters:

M
M is INTEGER The number of rows of the matrix Q. M >= 0.
NN is INTEGER The number of columns of the matrix Q. M >= N >= 0.
KK is INTEGER The number of elementary reflectors whose product defines the matrix Q. N >= K >= 0.
AA is COMPLEX array, dimension (LDA,N) On entry, the ith 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.
LDALDA is INTEGER The first dimension of the array A. LDA >= max(1,M).
TAUTAU is COMPLEX array, dimension (K) TAU(i) must contain the scalar factor of the elementary reflector H(i), as returned by CGEQRF.
WORKWORK is COMPLEX array, dimension (N)
INFOINFO is INTEGER = 0: successful exit < 0: if INFO = i, the ith argument has an illegal value
Author:

Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
 November 2011
Definition at line 115 of file cung2r.f.
Author
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