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CentOS 7.0 - man page for dlarzb.f (centos section 3)

dlarzb.f(3)				      LAPACK				      dlarzb.f(3)

NAME
       dlarzb.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dlarzb (SIDE, TRANS, DIRECT, STOREV, M, N, K, L, V, LDV, T, LDT, C, LDC, WORK,
	   LDWORK)
	   DLARZB applies a block reflector or its transpose to a general matrix.

Function/Subroutine Documentation
   subroutine dlarzb (characterSIDE, characterTRANS, characterDIRECT, characterSTOREV, integerM,
       integerN, integerK, integerL, double precision, dimension( ldv, * )V, integerLDV, double
       precision, dimension( ldt, * )T, integerLDT, double precision, dimension( ldc, * )C,
       integerLDC, double precision, dimension( ldwork, * )WORK, integerLDWORK)
       DLARZB applies a block reflector or its transpose to a general matrix.

       Purpose:

	    DLARZB applies a real block reflector H or its transpose H**T to
	    a real distributed M-by-N  C from the left or the right.

	    Currently, only STOREV = 'R' and DIRECT = 'B' are supported.

       Parameters:
	   SIDE

		     SIDE is CHARACTER*1
		     = 'L': apply H or H**T from the Left
		     = 'R': apply H or H**T from the Right

	   TRANS

		     TRANS is CHARACTER*1
		     = 'N': apply H (No transpose)
		     = 'C': apply H**T (Transpose)

	   DIRECT

		     DIRECT is CHARACTER*1
		     Indicates how H is formed from a product of elementary
		     reflectors
		     = 'F': H = H(1) H(2) . . . H(k) (Forward, not supported yet)
		     = 'B': H = H(k) . . . H(2) H(1) (Backward)

	   STOREV

		     STOREV is CHARACTER*1
		     Indicates how the vectors which define the elementary
		     reflectors are stored:
		     = 'C': Columnwise			      (not supported yet)
		     = 'R': Rowwise

	   M

		     M is INTEGER
		     The number of rows of the matrix C.

	   N

		     N is INTEGER
		     The number of columns of the matrix C.

	   K

		     K is INTEGER
		     The order of the matrix T (= the number of elementary
		     reflectors whose product defines the block reflector).

	   L

		     L is INTEGER
		     The number of columns of the matrix V containing the
		     meaningful part of the Householder reflectors.
		     If SIDE = 'L', M >= L >= 0, if SIDE = 'R', N >= L >= 0.

	   V

		     V is DOUBLE PRECISION array, dimension (LDV,NV).
		     If STOREV = 'C', NV = K; if STOREV = 'R', NV = L.

	   LDV

		     LDV is INTEGER
		     The leading dimension of the array V.
		     If STOREV = 'C', LDV >= L; if STOREV = 'R', LDV >= K.

	   T

		     T is DOUBLE PRECISION array, dimension (LDT,K)
		     The triangular K-by-K matrix T in the representation of the
		     block reflector.

	   LDT

		     LDT is INTEGER
		     The leading dimension of the array T. LDT >= K.

	   C

		     C is DOUBLE PRECISION array, dimension (LDC,N)
		     On entry, the M-by-N matrix C.
		     On exit, C is overwritten by H*C or H**T*C or C*H or C*H**T.

	   LDC

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

	   WORK

		     WORK is DOUBLE PRECISION array, dimension (LDWORK,K)

	   LDWORK

		     LDWORK is INTEGER
		     The leading dimension of the array WORK.
		     If SIDE = 'L', LDWORK >= max(1,N);
		     if SIDE = 'R', LDWORK >= max(1,M).

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Contributors:
	   A. Petitet, Computer Science Dept., Univ. of Tenn., Knoxville, USA

       Further Details:

       Definition at line 183 of file dlarzb.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      dlarzb.f(3)


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