CLARFX(l) ) CLARFX(l)
NAME
CLARFX - applie a complex elementary reflector H to a complex m by n matrix C, from either the left or the right
SYNOPSIS
SUBROUTINE CLARFX( SIDE, M, N, V, TAU, C, LDC, WORK )
CHARACTER SIDE
INTEGER LDC, M, N
COMPLEX TAU
COMPLEX C( LDC, * ), V( * ), WORK( * )
PURPOSE
CLARFX applies a complex elementary reflector H to a complex m by n matrix C, from either the left or the right. H is represented in the
form
H = I - tau * v * v'
where tau is a complex scalar and v is a complex vector.
If tau = 0, then H is taken to be the unit matrix
This version uses inline code if H has order < 11.
ARGUMENTS
SIDE (input) CHARACTER*1
= 'L': form H * C
= 'R': form C * H
M (input) INTEGER
The number of rows of the matrix C.
N (input) INTEGER
The number of columns of the matrix C.
V (input) COMPLEX array, dimension (M) if SIDE = 'L'
or (N) if SIDE = 'R' The vector v in the representation of H.
TAU (input) COMPLEX
The value tau in the representation of H.
C (input/output) COMPLEX array, dimension (LDC,N)
On entry, the m by n matrix C. On exit, C is overwritten by the matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.
LDC (input) INTEGER
The leading dimension of the array C. LDA >= max(1,M).
WORK (workspace) COMPLEX array, dimension (N) if SIDE = 'L'
or (M) if SIDE = 'R' WORK is not referenced if H has order < 11.
LAPACK version 3.0 15 June 2000 CLARFX(l)
Check Out this Related Man Page
ZLARF(l) ) ZLARF(l)
NAME
ZLARF - applie a complex elementary reflector H to a complex M-by-N matrix C, from either the left or the right
SYNOPSIS
SUBROUTINE ZLARF( SIDE, M, N, V, INCV, TAU, C, LDC, WORK )
CHARACTER SIDE
INTEGER INCV, LDC, M, N
COMPLEX*16 TAU
COMPLEX*16 C( LDC, * ), V( * ), WORK( * )
PURPOSE
ZLARF applies a complex elementary reflector H to a complex M-by-N matrix C, from either the left or the right. H is represented in the
form
H = I - tau * v * v'
where tau is a complex scalar and v is a complex vector.
If tau = 0, then H is taken to be the unit matrix.
To apply H' (the conjugate transpose of H), supply conjg(tau) instead tau.
ARGUMENTS
SIDE (input) CHARACTER*1
= 'L': form H * C
= 'R': form C * H
M (input) INTEGER
The number of rows of the matrix C.
N (input) INTEGER
The number of columns of the matrix C.
V (input) COMPLEX*16 array, dimension
(1 + (M-1)*abs(INCV)) if SIDE = 'L' or (1 + (N-1)*abs(INCV)) if SIDE = 'R' The vector v in the representation of H. V is not used
if TAU = 0.
INCV (input) INTEGER
The increment between elements of v. INCV <> 0.
TAU (input) COMPLEX*16
The value tau in the representation of H.
C (input/output) COMPLEX*16 array, dimension (LDC,N)
On entry, the M-by-N matrix C. On exit, C is overwritten by the matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.
LDC (input) INTEGER
The leading dimension of the array C. LDC >= max(1,M).
WORK (workspace) COMPLEX*16 array, dimension
(N) if SIDE = 'L' or (M) if SIDE = 'R'
LAPACK version 3.0 15 June 2000 ZLARF(l)
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