complex_eig(3)

NAME
complex_eig

SYNOPSIS

  Functions
subroutine clarfy (UPLO, N, V, INCV, TAU, C, LDC, WORK)
CLARFY

Detailed Description

This is the group of complex LAPACK TESTING EIG routines.

Function Documentation

  subroutine clarfy (character UPLO, integer N, complex, dimension( * ) V, integer INCV, complex TAU, complex, dimension( ldc, * ) C, integer LDC, complex, dimension( * ) WORK)

CLARFY

Purpose:

     CLARFY applies an elementary reflector, or Householder matrix, H,
     to an n x n Hermitian matrix C, from both the left and the right.
     H is represented in the form
        H = I - tau * v * v'
     where  tau  is a scalar and  v  is a vector.
     If  tau  is  zero, then  H  is taken to be the unit matrix.

Parameters:
    UPLO

              UPLO is CHARACTER*1
              Specifies whether the upper or lower triangular part of the
              Hermitian matrix C is stored.
              = 'U':  Upper triangle
              = 'L':  Lower triangle

    N

              N is INTEGER
              The number of rows and columns of the matrix C.  N >= 0.

    V

              V is COMPLEX array, dimension
                      (1 + (N-1)*abs(INCV))
              The vector v as described above.

    INCV

              INCV is INTEGER
              The increment between successive elements of v.  INCV must
              not be zero.

    TAU

              TAU is COMPLEX
              The value tau as described above.

    C

              C is COMPLEX array, dimension (LDC, N)
              On entry, the matrix C.
              On exit, C is overwritten by H * C * H'.

    LDC

              LDC is INTEGER
              The leading dimension of the array C.  LDC >= max( 1, N ).

    WORK

              WORK is COMPLEX array, dimension (N)

Author:
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Date:
    December 2016

Definition at line 110 of file clarfy.f.

Author

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