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CentOS 7.0 - man page for dlapll (centos section 3)

dlapll.f(3)						LAPACK						  dlapll.f(3)

NAME
dlapll.f -
SYNOPSIS
Functions/Subroutines subroutine dlapll (N, X, INCX, Y, INCY, SSMIN) DLAPLL measures the linear dependence of two vectors. Function/Subroutine Documentation subroutine dlapll (integerN, double precision, dimension( * )X, integerINCX, double precision, dimension( * )Y, integerINCY, double precisionSSMIN) DLAPLL 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 DOUBLE PRECISION 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 DOUBLE PRECISION 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: September 2012 Definition at line 103 of file dlapll.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.2 Tue Sep 25 2012 dlapll.f(3)
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