dlagtm.f(3) [debian man page]

dlagtm.f(3)							      LAPACK							       dlagtm.f(3)

NAME

       dlagtm.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dlagtm (TRANS, N, NRHS, ALPHA, DL, D, DU, X, LDX, BETA, B, LDB)
	   DLAGTM

Function/Subroutine Documentation
   subroutine dlagtm (characterTRANS, integerN, integerNRHS, double precisionALPHA, double precision, dimension( * )DL, double precision,
       dimension( * )D, double precision, dimension( * )DU, double precision, dimension( ldx, * )X, integerLDX, double precisionBETA, double
       precision, dimension( ldb, * )B, integerLDB)
       DLAGTM

       Purpose:

	    DLAGTM performs a matrix-vector product of the form

	       B := alpha * A * X + beta * B

	    where A is a tridiagonal matrix of order N, B and X are N by NRHS
	    matrices, and alpha and beta are real scalars, each of which may be
	    0., 1., or -1.

       Parameters:
	   TRANS

		     TRANS is CHARACTER*1
		     Specifies the operation applied to A.
		     = 'N':  No transpose, B := alpha * A * X + beta * B
		     = 'T':  Transpose,    B := alpha * A'* X + beta * B
		     = 'C':  Conjugate transpose = Transpose

	   N

		     N is INTEGER
		     The order of the matrix A.  N >= 0.

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrices X and B.

	   ALPHA

		     ALPHA is DOUBLE PRECISION
		     The scalar alpha.	ALPHA must be 0., 1., or -1.; otherwise,
		     it is assumed to be 0.

	   DL

		     DL is DOUBLE PRECISION array, dimension (N-1)
		     The (n-1) sub-diagonal elements of T.

	   D

		     D is DOUBLE PRECISION array, dimension (N)
		     The diagonal elements of T.

	   DU

		     DU is DOUBLE PRECISION array, dimension (N-1)
		     The (n-1) super-diagonal elements of T.

	   X

		     X is DOUBLE PRECISION array, dimension (LDX,NRHS)
		     The N by NRHS matrix X.

	   LDX

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

	   BETA

		     BETA is DOUBLE PRECISION
		     The scalar beta.  BETA must be 0., 1., or -1.; otherwise,
		     it is assumed to be 1.

	   B

		     B is DOUBLE PRECISION array, dimension (LDB,NRHS)
		     On entry, the N by NRHS matrix B.
		     On exit, B is overwritten by the matrix expression
		     B := alpha * A * X + beta * B.

	   LDB

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

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       Definition at line 145 of file dlagtm.f.

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

Version 3.4.1							  Sun May 26 2013						       dlagtm.f(3)

Check Out this Related Man Page

DLAGTM(l)								 )								 DLAGTM(l)

NAME

       DLAGTM  -  perform  a matrix-vector product of the form	B := alpha * A * X + beta * B  where A is a tridiagonal matrix of order N, B and X
       are N by NRHS matrices, and alpha and beta are real scalars, each of which may be 0., 1., or -1

SYNOPSIS

       SUBROUTINE DLAGTM( TRANS, N, NRHS, ALPHA, DL, D, DU, X, LDX, BETA, B, LDB )

	   CHARACTER	  TRANS

	   INTEGER	  LDB, LDX, N, NRHS

	   DOUBLE	  PRECISION ALPHA, BETA

	   DOUBLE	  PRECISION B( LDB, * ), D( * ), DL( * ), DU( * ), X( LDX, * )

PURPOSE

       DLAGTM performs a matrix-vector product of the form B := alpha * A * X + beta * B where A is a tridiagonal matrix of order N, B and X are N
       by NRHS matrices, and alpha and beta are real scalars, each of which may be 0., 1., or -1.

ARGUMENTS

       TRANS   (input) CHARACTER
	       Specifies the operation applied to A.  = 'N':  No transpose, B := alpha * A * X + beta * B
	       = 'T':  Transpose,    B := alpha * A'* X + beta * B
	       = 'C':  Conjugate transpose = Transpose

       N       (input) INTEGER
	       The order of the matrix A.  N >= 0.

       NRHS    (input) INTEGER
	       The number of right hand sides, i.e., the number of columns of the matrices X and B.

       ALPHA   (input) DOUBLE PRECISION
	       The scalar alpha.  ALPHA must be 0., 1., or -1.; otherwise, it is assumed to be 0.

       DL      (input) DOUBLE PRECISION array, dimension (N-1)
	       The (n-1) sub-diagonal elements of T.

       D       (input) DOUBLE PRECISION array, dimension (N)
	       The diagonal elements of T.

       DU      (input) DOUBLE PRECISION array, dimension (N-1)
	       The (n-1) super-diagonal elements of T.

       X       (input) DOUBLE PRECISION array, dimension (LDX,NRHS)
	       The N by NRHS matrix X.	LDX	(input) INTEGER The leading dimension of the array X.  LDX >= max(N,1).

       BETA    (input) DOUBLE PRECISION
	       The scalar beta.  BETA must be 0., 1., or -1.; otherwise, it is assumed to be 1.

       B       (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS)
	       On entry, the N by NRHS matrix B.  On exit, B is overwritten by the matrix expression B := alpha * A * X + beta * B.

       LDB     (input) INTEGER
	       The leading dimension of the array B.  LDB >= max(N,1).

LAPACK version 3.0						   15 June 2000 							 DLAGTM(l)

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dlagtm.f(3) [debian man page]

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