# dlar2v.f man page

dlar2v.f

## Synopsis

### Functions/Subroutines

subroutine dlar2v (N, X, Y, Z, INCX, C, S, 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.

## Function/Subroutine Documentation

### 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.

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:

N

```          N is INTEGER
The number of plane rotations to be applied.```

X

```          X is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector x.```

Y

```          Y is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector y.```

Z

```          Z is DOUBLE PRECISION array,
dimension (1+(N-1)*INCX)
The vector z.```

INCX

```          INCX is INTEGER
The increment between elements of X, Y and Z. INCX > 0.```

C

```          C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The cosines of the plane rotations.```

S

```          S is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
The sines of the plane rotations.```

INCC

```          INCC is INTEGER
The increment between elements of C and S. INCC > 0.```
Author:

Univ. of Tennessee

Univ. of California Berkeley

NAG Ltd.

Date:

December 2016

Definition at line 112 of file dlar2v.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dlar2v(3) is an alias of dlar2v.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK