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

N, ALPHA, X, INCX, TAU )

INTEGER
INCX, N

DOUBLE
PRECISION ALPHA, TAU

DOUBLE
PRECISION X( * )
PURPOSE
DLARFP 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) DOUBLE PRECISION

On entry, the value alpha.
On exit, it is overwritten with the value beta.
 X (input/output) DOUBLE PRECISION 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) DOUBLE PRECISION

The value tau.
Pages related to dlarfp
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 dlarfb (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
 dlarfg (l)  generates a real elementary reflector H of order n, such that H * ( alpha ) = ( beta ), Haq * H = I
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