SLAR2V(l) ) SLAR2V(l)
NAME
SLAR2V - applie a vector of real plane rotations from both sides to a sequence of 2-by-2 real symmetric matrices, defined by the elements
of the vectors x, y and z
SYNOPSIS
SUBROUTINE SLAR2V( N, X, Y, Z, INCX, C, S, INCC )
INTEGER INCC, INCX, N
REAL C( * ), S( * ), X( * ), Y( * ), Z( * )
PURPOSE
SLAR2V applies a vector of real plane rotations from both sides to a sequence of 2-by-2 real symmetric matrices, defined by the elements of
the vectors x, y and z. For i = 1,2,...,n
( x(i) z(i) ) := ( c(i) s(i) ) ( x(i) z(i) ) ( c(i) -s(i) )
( z(i) y(i) ) ( -s(i) c(i) ) ( z(i) y(i) ) ( s(i) c(i) )
ARGUMENTS
N (input) INTEGER
The number of plane rotations to be applied.
X (input/output) REAL array,
dimension (1+(N-1)*INCX) The vector x.
Y (input/output) REAL array,
dimension (1+(N-1)*INCX) The vector y.
Z (input/output) REAL array,
dimension (1+(N-1)*INCX) The vector z.
INCX (input) INTEGER
The increment between elements of X, Y and Z. INCX > 0.
C (input) REAL array, dimension (1+(N-1)*INCC)
The cosines of the plane rotations.
S (input) REAL array, dimension (1+(N-1)*INCC)
The sines of the plane rotations.
INCC (input) INTEGER
The increment between elements of C and S. INCC > 0.
LAPACK version 3.0 15 June 2000 SLAR2V(l)
