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.


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