2. EL 8
  3. lapack
  4. zrot(3)

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zrot.f(3) LAPACK zrot.f(3)

NAME

zrot.f

SYNOPSIS

Functions/Subroutines


subroutine zrot (N, CX, INCX, CY, INCY, C, S)
ZROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

Function/Subroutine Documentation

subroutine zrot (integer N, complex*16, dimension( * ) CX, integer INCX, complex*16, dimension( * ) CY, integer INCY, double precision C, complex*16 S)

ZROT applies a plane rotation with real cosine and complex sine to a pair of complex vectors.

Purpose: 



 ZROT   applies a plane rotation, where the cos (C) is real and the


 sin (S) is complex, and the vectors CX and CY are complex.

Parameters:

N 



          N is INTEGER


          The number of elements in the vectors CX and CY.

CX



          CX is COMPLEX*16 array, dimension (N)


          On input, the vector X.


          On output, CX is overwritten with C*X + S*Y.

INCX



          INCX is INTEGER


          The increment between successive values of CY.  INCX <> 0.

CY



          CY is COMPLEX*16 array, dimension (N)


          On input, the vector Y.


          On output, CY is overwritten with -CONJG(S)*X + C*Y.

INCY



          INCY is INTEGER


          The increment between successive values of CY.  INCX <> 0.

C



          C is DOUBLE PRECISION

S



          S is COMPLEX*16


          C and S define a rotation


             [  C          S  ]


             [ -conjg(S)   C  ]


          where C*C + S*CONJG(S) = 1.0.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

December 2016

Definition at line 105 of file zrot.f.

Author

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Tue Nov 14 2017 Version 3.8.0