slarfp (l)  Linux Man Pages
slarfp: generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
Command to display slarfp
manual in Linux: $ man l slarfp
NAME
SLARFP  generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
SYNOPSIS
 SUBROUTINE SLARFP(

N, ALPHA, X, INCX, TAU )

INTEGER
INCX, N

REAL
ALPHA, TAU

REAL
X( * )
PURPOSE
SLARFP generates a real elementary reflector H of order n, such
that
( x ) ( 0 )
where alpha and beta are scalars, beta is nonnegative, and x is
an (n1)element real vector. H is represented in the form
H = I  tau * ( 1 ) * ( 1 vaq ) ,
( v )
where tau is a real scalar and v is a real (n1)element
vector.
If the elements of x are all zero, then tau = 0 and H is taken to be
the unit matrix.
Otherwise 1 <= tau <= 2.
ARGUMENTS
 N (input) INTEGER

The order of the elementary reflector.
 ALPHA (input/output) REAL

On entry, the value alpha.
On exit, it is overwritten with the value beta.
 X (input/output) REAL array, dimension

(1+(N2)*abs(INCX))
On entry, the vector x.
On exit, it is overwritten with the vector v.
 INCX (input) INTEGER

The increment between elements of X. INCX > 0.
 TAU (output) REAL

The value tau.
Pages related to slarfp
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 slarfb (l)  applies a real block reflector H or its transpose Haq to a real m by n matrix C, from either the left or the right
 slarfg (l)  generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
 slarft (l)  forms the triangular factor T of a real block reflector H of order n, which is defined as a product of k elementary reflectors
 slarfx (l)  applies a real elementary reflector H to a real m by n matrix C, from either the left or the right
 slar1v (l)  computes the (scaled) rth column of the inverse of the sumbmatrix in rows B1 through BN of the tridiagonal matrix L D L^T  sigma I
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