zunbdb5.f - Online Linux Manual Page

Section : 3
Updated : Tue Nov 14 2017
Source : Version 3.8.0
Note : LAPACK
NAMEzunbdb5.f
SYNOPSIS
Functions/Subroutinessubroutine zunbdb5 (M1, M2, N, X1, INCX1, X2, INCX2, Q1, LDQ1, Q2, LDQ2, WORK, LWORK, INFO)
ZUNBDB5
Function/Subroutine Documentation
subroutine zunbdb5 (integer M1, integer M2, integer N, complex*16, dimension(*) X1, integer INCX1, complex*16, dimension(*) X2, integer INCX2, complex*16, dimension(ldq1,*) Q1, integer LDQ1, complex*16, dimension(ldq2,*) Q2, integer LDQ2, complex*16, dimension(*) WORK, integer LWORK, integer INFO)ZUNBDB5 Purpose: ZUNBDB5 orthogonalizes the column vector X = [ X1 ] [ X2 ] with respect to the columns of Q = [ Q1 ] . [ Q2 ] The columns of Q must be orthonormal. If the projection is zero according to Kahan's "twice is enough" criterion, then some other vector from the orthogonal complement is returned. This vector is chosen in an arbitrary but deterministic way.Parameters: M1 M1 is INTEGER The dimension of X1 and the number of rows in Q1. 0 <= M1.
M2 M2 is INTEGER The dimension of X2 and the number of rows in Q2. 0 <= M2.
N N is INTEGER The number of columns in Q1 and Q2. 0 <= N.
X1 X1 is COMPLEX*16 array, dimension (M1) On entry, the top part of the vector to be orthogonalized. On exit, the top part of the projected vector.
INCX1 INCX1 is INTEGER Increment for entries of X1.
X2 X2 is COMPLEX*16 array, dimension (M2) On entry, the bottom part of the vector to be orthogonalized. On exit, the bottom part of the projected vector.
INCX2 INCX2 is INTEGER Increment for entries of X2.
Q1 Q1 is COMPLEX*16 array, dimension (LDQ1, N) The top part of the orthonormal basis matrix.
LDQ1 LDQ1 is INTEGER The leading dimension of Q1. LDQ1 >= M1.
Q2 Q2 is COMPLEX*16 array, dimension (LDQ2, N) The bottom part of the orthonormal basis matrix.
LDQ2 LDQ2 is INTEGER The leading dimension of Q2. LDQ2 >= M2.
WORK WORK is COMPLEX*16 array, dimension (LWORK)
LWORK LWORK is INTEGER The dimension of the array WORK. LWORK >= N.
INFO INFO is INTEGER = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value.Author: Univ​. of Tennessee Univ​. of California Berkeley Univ​. of Colorado Denver NAG Ltd​. Date: July 2012 Definition at line 158 of file zunbdb5​.f​.
AuthorGenerated automatically by Doxygen for LAPACK from the source code​. 0
Johanes Gumabo
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