
NAMEzlarf.f SYNOPSISFunctions/Subroutinessubroutine zlarf (SIDE, M, N, V, INCV, TAU, C, LDC, WORK) Function/Subroutine Documentationsubroutine zlarf (characterSIDE, integerM, integerN, complex*16, dimension( * )V, integerINCV, complex*16TAU, complex*16, dimension( ldc, * )C, integerLDC, complex*16, dimension( * )WORK)ZLARF applies an elementary reflector to a general rectangular matrix. Purpose:ZLARF applies a complex elementary reflector H to a complex MbyN matrix C, from either the left or the right. H is represented in the form H = I  tau * v * v**H where tau is a complex scalar and v is a complex vector. If tau = 0, then H is taken to be the unit matrix. To apply H**H, supply conjg(tau) instead tau. SIDE
Author:
SIDE is CHARACTER*1 = 'L': form H * C = 'R': form C * HM M is INTEGER The number of rows of the matrix C.N N is INTEGER The number of columns of the matrix C.V V is COMPLEX*16 array, dimension (1 + (M1)*abs(INCV)) if SIDE = 'L' or (1 + (N1)*abs(INCV)) if SIDE = 'R' The vector v in the representation of H. V is not used if TAU = 0.INCV INCV is INTEGER The increment between elements of v. INCV <> 0.TAU TAU is COMPLEX*16 The value tau in the representation of H.C C is COMPLEX*16 array, dimension (LDC,N) On entry, the MbyN matrix C. On exit, C is overwritten by the matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.LDC LDC is INTEGER The leading dimension of the array C. LDC >= max(1,M).WORK WORK is COMPLEX*16 array, dimension (N) if SIDE = 'L' or (M) if SIDE = 'R' Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.
Date:
September 2012
Definition at line 129 of file zlarf.f.
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