table of contents
complex16_eig(3) | LAPACK | complex16_eig(3) |
NAME¶
complex16_eigSYNOPSIS¶
Functions¶
subroutine zlarfy (UPLO, N, V, INCV, TAU, C, LDC, WORK)
ZLARFY
Detailed Description¶
This is the group of complex16 LAPACK TESTING EIG routines.Function Documentation¶
subroutine zlarfy (character UPLO, integer N, complex*16, dimension( * ) V, integer INCV, complex*16 TAU, complex*16, dimension( ldc, * ) C, integer LDC, complex*16, dimension( * ) WORK)¶
ZLARFYPurpose:
ZLARFY 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*16 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*16 The value tau as described above.
C
C is COMPLEX*16 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*16 array, dimension (N)
Author:
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
December 2016
Author¶
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