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CentOS 7.0 - man page for dlagtm (centos section 3)

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 performs a matrix-matrix product of the form C = aAB+BC, where A is a
	   tridiagonal matrix, B and C are rectangular matrices, and a and B are scalars, which
	   may be 0, 1, or -1.

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 performs a matrix-matrix product of the form C = aAB+BC, where A is a tridiagonal
       matrix, B and C are rectangular matrices, and a and B are scalars, which may be 0, 1, or
       -1.

       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:
	   September 2012

       Definition at line 145 of file dlagtm.f.

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

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


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