dlar2v()

subroutine dlar2v	(	integer	n,
		double precision, dimension( * )	x,
		double precision, dimension( * )	y,
		double precision, dimension( * )	z,
		integer	incx,
		double precision, dimension( * )	c,
		double precision, dimension( * )	s,
		integer	incc )

DLAR2V applies a vector of plane rotations with real cosines and real sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices.

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Purpose:

!>
!> DLAR2V 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) )
!> 

Parameters

[in]	N	!> N is INTEGER !> The number of plane rotations to be applied. !>
[in,out]	X	!> X is DOUBLE PRECISION array, !> dimension (1+(N-1)*INCX) !> The vector x. !>
[in,out]	Y	!> Y is DOUBLE PRECISION array, !> dimension (1+(N-1)*INCX) !> The vector y. !>
[in,out]	Z	!> Z is DOUBLE PRECISION array, !> dimension (1+(N-1)*INCX) !> The vector z. !>
[in]	INCX	!> INCX is INTEGER !> The increment between elements of X, Y and Z. INCX > 0. !>
[in]	C	!> C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC) !> The cosines of the plane rotations. !>
[in]	S	!> S is DOUBLE PRECISION array, dimension (1+(N-1)*INCC) !> The sines of the plane rotations. !>
[in]	INCC	!> INCC is INTEGER !> The increment between elements of C and S. INCC > 0. !>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.