Provided by: liblapack-doc_3.3.1-1_all

#### NAME

```       LAPACK-3  -  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

```

#### SYNOPSIS

```       SUBROUTINE DLAR2V( N, X, Y, Z, INCX, C, S, INCC )

INTEGER        INCC, INCX, N

DOUBLE         PRECISION C( * ), S( * ), X( * ), Y( * ), Z( * )

```

#### 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) )

```

#### ARGUMENTS

```        N       (input) INTEGER
The number of plane rotations to be applied.

X       (input/output) DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector x.

Y       (input/output) DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector y.

Z       (input/output) DOUBLE PRECISION 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) DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The cosines of the plane rotations.

S       (input) DOUBLE PRECISION 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 auxiliary routine (version 3.2)     April 2011                            DLAR2V(3lapack)
```