zlapll.f - Online Linux Manual Page

Section : 3
Updated : Tue Nov 14 2017
Source : Version 3.8.0
Note : LAPACK
NAMEzlapll.f
SYNOPSIS
Functions/Subroutinessubroutine zlapll (N, X, INCX, Y, INCY, SSMIN)
ZLAPLL measures the linear dependence of two vectors​.
Function/Subroutine Documentation
subroutine zlapll (integer N, complex*16, dimension( * ) X, integer INCX, complex*16, dimension( * ) Y, integer INCY, double precision SSMIN)ZLAPLL measures the linear dependence of two vectors​. Purpose: Given two column vectors X and Y, let A = ( X Y ). The subroutine first computes the QR factorization of A = Q*R, and then computes the SVD of the 2-by-2 upper triangular matrix R. The smaller singular value of R is returned in SSMIN, which is used as the measurement of the linear dependency of the vectors X and Y.Parameters: N N is INTEGER The length of the vectors X and Y.
X X is COMPLEX*16 array, dimension (1+(N-1)*INCX) On entry, X contains the N-vector X. On exit, X is overwritten.
INCX INCX is INTEGER The increment between successive elements of X. INCX > 0.
Y Y is COMPLEX*16 array, dimension (1+(N-1)*INCY) On entry, Y contains the N-vector Y. On exit, Y is overwritten.
INCY INCY is INTEGER The increment between successive elements of Y. INCY > 0.
SSMIN SSMIN is DOUBLE PRECISION The smallest singular value of the N-by-2 matrix A = ( X Y ).Author: Univ​. of Tennessee Univ​. of California Berkeley Univ​. of Colorado Denver NAG Ltd​. Date: December 2016 Definition at line 102 of file zlapll​.f​.
AuthorGenerated automatically by Doxygen for LAPACK from the source code​. 0
Johanes Gumabo
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