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NAME
     dlartv - apply a vector of real plane rotations to  elements
     of the real vectors x and y

SYNOPSIS
     SUBROUTINE DLARTV( N, X, INCX, Y, INCY, C, S, INCC )

     INTEGER INCC, INCX, INCY, N

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



     #include <sunperf.h>

     void dlartv(int n, double *dx, int  incx,  double  *dy,  int
               incy, double *dc, double *s, int incc) ;

PURPOSE
     DLARTV applies a vector of real plane rotations to  elements
     of the real vectors x and y. For i = 1,2,...,n

        ( x(i) ) := (  c(i)  s(i) ) ( x(i) )
        ( y(i) )    ( -s(i)  c(i) ) ( y(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.

     INCX      (input) INTEGER
               The increment between elements of X. INCX > 0.

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

     INCY      (input) INTEGER
               The increment between elements of Y. INCY > 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.

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