SLAR2V(3)      LAPACK routine of NEC Numeric Library Collection      SLAR2V(3)



NAME
       SLAR2V

SYNOPSIS
       SUBROUTINE SLAR2V (N, X, Y, Z, INCX, C, S, INCC)



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

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

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

           Z         (input/output)
                     Z is REAL array,
                                    dimension (1+(N-1)*INCX)
                     The vector z.

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

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

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

           INCC      (input)
                     INCC is INTEGER
                     The increment between elements of C and S. INCC > 0.



LAPACK routine                  31 October 2017                      SLAR2V(3)