dlar2v.f

Section: LAPACK (3)
Updated: Tue Nov 14 2017
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NAME

dlar2v.f  

SYNOPSIS


 

Functions/Subroutines


subroutine dlar2v (N, X, Y, Z, INCX, C, S, INCC)
DLAR2V applies a vector of plane rotations with real cosines and real sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices.  

Function/Subroutine Documentation

 

subroutine dlar2v (integer N, double precision, dimension( * ) X, double precision, dimension( * ) Y, double precision, dimension( * ) Z, integer INCX, double precision, dimension( * ) C, double precision, dimension( * ) S, integer INCC)

DLAR2V applies a vector of plane rotations with real cosines and real sines from both sides to a sequence of 2-by-2 symmetric/Hermitian matrices.

Purpose:

 DLAR2V 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) )


 

Parameters:

N

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


X

          X is DOUBLE PRECISION array,
                         dimension (1+(N-1)*INCX)
          The vector x.


Y

          Y is DOUBLE PRECISION array,
                         dimension (1+(N-1)*INCX)
          The vector y.


Z

          Z is DOUBLE PRECISION 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 DOUBLE PRECISION 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.

Date:

December 2016

Definition at line 112 of file dlar2v.f.  

Author

Generated automatically by Doxygen for LAPACK from the source code.


 

Index

NAME
SYNOPSIS
Functions/Subroutines
Function/Subroutine Documentation
subroutine dlar2v (integer N, double precision, dimension( * ) X, double precision, dimension( * ) Y, double precision, dimension( * ) Z, integer INCX, double precision, dimension( * ) C, double precision, dimension( * ) S, integer INCC)
Author
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