zung2r.f - Online Linux Manual Page

Section : 3
Updated : Tue Nov 14 2017
Source : Version 3.8.0
Note : LAPACK
NAMEzung2r.f
SYNOPSIS
Functions/Subroutinessubroutine zung2r (M, N, K, A, LDA, TAU, WORK, INFO)
ZUNG2R
Function/Subroutine Documentation
subroutine zung2r (integer M, integer N, integer K, complex*16, dimension( lda, * ) A, integer LDA, complex*16, dimension( * ) TAU, complex*16, dimension( * ) WORK, integer INFO)ZUNG2R Purpose: ZUNG2R 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 ZGEQRF.Parameters: M M is INTEGER The number of rows of the matrix Q. M >= 0.
N N is INTEGER The number of columns of the matrix Q. M >= N >= 0.
K K is INTEGER The number of elementary reflectors whose product defines the matrix Q. N >= K >= 0.
A A is COMPLEX*16 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 ZGEQRF in the first k columns of its array argument A. On exit, the m by n matrix Q.
LDA LDA is INTEGER The first dimension of the array A. LDA >= max(1,M).
TAU TAU is COMPLEX*16 array, dimension (K) TAU(i) must contain the scalar factor of the elementary reflector H(i), as returned by ZGEQRF.
WORK WORK is COMPLEX*16 array, dimension (N)
INFO INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument has an illegal valueAuthor: Univ​. of Tennessee Univ​. of California Berkeley Univ​. of Colorado Denver NAG Ltd​. Date: December 2016 Definition at line 116 of file zung2r​.f​.
AuthorGenerated automatically by Doxygen for LAPACK from the source code​. 0
Johanes Gumabo
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