zlar2v.f3
Usage
Functions/Subroutines
subroutine zlar2v (n, x, y, z, incx, c, s, incc)
ZLAR2V applies a vector of plane rotations with real cosines and complex sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices.
Function/Subroutine Documentation
subroutine zlar2v (integer n, complex*16, dimension( * ) x, complex*16, dimension( * ) y, complex*16, dimension( * ) z, integer incx, double precision, dimension( * ) c, complex*16, dimension( * ) s, integer incc)
ZLAR2V applies a vector of plane rotations with real cosines and complex sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices.
Purpose:
!> !> ZLAR2V applies a vector of complex plane rotations with real cosines !> from both sides to a sequence of 2-by-2 complex Hermitian matrices, !> defined by the elements of the vectors x, y and z. For i = 1,2,...,n !> !> ( x(i) z(i) ) := !> ( conjg(z(i)) y(i) ) !> !> ( c(i) conjg(s(i)) ) ( x(i) z(i) ) ( c(i) -conjg(s(i)) ) !> ( -s(i) c(i) ) ( conjg(z(i)) y(i) ) ( s(i) c(i) ) !>
Parameters
N
!> N is INTEGER !> The number of plane rotations to be applied. !>
X
!> X is COMPLEX*16 array, dimension (1+(N-1)*INCX) !> The vector x; the elements of x are assumed to be real. !>
Y
!> Y is COMPLEX*16 array, dimension (1+(N-1)*INCX) !> The vector y; the elements of y are assumed to be real. !>
Z
!> Z is COMPLEX*16 array, dimension (1+(N-1)*INCX) !> The vector z. !>
INCX
!> INCX is INTEGER !> The increment between elements of X, Y and Z. INCX > 0. !>
C
!> C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC) !> The cosines of the plane rotations. !>
S
!> S is COMPLEX*16 array, dimension (1+(N-1)*INCC) !> The sines of the plane rotations. !>
INCC
!> INCC is INTEGER !> The increment between elements of C and S. INCC > 0. !>
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Definition at line 110 of file zlar2v.f.
Releases
4 releases since Debian 7 (Wheezy); the text changed 3 times.