zlargv.f(3)

NAME
zlargv.f -

SYNOPSIS

  Functions/Subroutines
subroutine ZLARGV (N, X, INCX, Y, INCY, C, INCC)
ZLARGV

Function/Subroutine Documentation

  subroutine ZLARGV (INTEGERN, COMPLEX*16, dimension( * )X, INTEGERINCX, COMPLEX*16, dimension( * )Y, INTEGERINCY, DOUBLE PRECISION, dimension( * )C, INTEGERINCC)

ZLARGV

Purpose:

     ZLARGV generates a vector of complex plane rotations with real
     cosines, determined by elements of the complex vectors x and y.
     For i = 1,2,...,n
        (        c(i)   s(i) ) ( x(i) ) = ( r(i) )
        ( -conjg(s(i))  c(i) ) ( y(i) ) = (   0  )
        where c(i)**2 + ABS(s(i))**2 = 1
     The following conventions are used (these are the same as in ZLARTG,
     but differ from the BLAS1 routine ZROTG):
        If y(i)=0, then c(i)=1 and s(i)=0.
        If x(i)=0, then c(i)=0 and s(i) is chosen so that r(i) is real.

Parameters:
    N

              N is INTEGER
              The number of plane rotations to be generated.

    X

              X is COMPLEX*16 array, dimension (1+(N-1)*INCX)
              On entry, the vector x.
              On exit, x(i) is overwritten by r(i), for i = 1,...,n.

    INCX

              INCX is INTEGER
              The increment between elements of X. INCX > 0.

    Y

              Y is COMPLEX*16 array, dimension (1+(N-1)*INCY)
              On entry, the vector y.
              On exit, the sines of the plane rotations.

    INCY

              INCY is INTEGER
              The increment between elements of Y. INCY > 0.

    C

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

    INCC

              INCC is INTEGER
              The increment between elements of C. INCC > 0.

Author:
    Univ'. of Tennessee

    Univ'. of California Berkeley

    Univ'. of Colorado Denver

    NAG Ltd'.

Date:
    November 2011

Further Details:

      6-6-96 - Modified with a new algorithm by W. Kahan and J. Demmel
      This version has a few statements commented out for thread safety
      (machine parameters are computed on each entry). 10 feb 03, SJH.

Definition at line 123 of file zlargv.f'.

Author

Generated automatically by Doxygen for LAPACK from the source code'.