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clagtm(3) [centos man page]

clagtm.f(3)							      LAPACK							       clagtm.f(3)

NAME

       clagtm.f -

SYNOPSIS

   Functions/Subroutines
       subroutine clagtm (TRANS, N, NRHS, ALPHA, DL, D, DU, X, LDX, BETA, B, LDB)
	   CLAGTM 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 clagtm (characterTRANS, integerN, integerNRHS, realALPHA, complex, dimension( * )DL, complex, dimension( * )D, complex, dimension( *
       )DU, complex, dimension( ldx, * )X, integerLDX, realBETA, complex, dimension( ldb, * )B, integerLDB)
       CLAGTM 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:

	    CLAGTM 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**T * X + beta * B
		     = 'C':  Conjugate transpose, B := alpha * A**H * X + beta * B

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

	   DL

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

	   D

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

	   DU

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

	   X

		     X is COMPLEX 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 REAL
		     The scalar beta.  BETA must be 0., 1., or -1.; otherwise,
		     it is assumed to be 1.

	   B

		     B is COMPLEX 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 clagtm.f.

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

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

Check Out this Related Man Page

CLAGTM(l)								 )								 CLAGTM(l)

NAME

       CLAGTM  -  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 CLAGTM( TRANS, N, NRHS, ALPHA, DL, D, DU, X, LDX, BETA, B, LDB )

	   CHARACTER	  TRANS

	   INTEGER	  LDB, LDX, N, NRHS

	   REAL 	  ALPHA, BETA

	   COMPLEX	  B( LDB, * ), D( * ), DL( * ), DU( * ), X( LDX, * )

PURPOSE

       CLAGTM 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**T * X + beta * B
	       = 'C':  Conjugate transpose, B := alpha * A**H * X + beta * B

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

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

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

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

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

       B       (input/output) COMPLEX 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 							 CLAGTM(l)
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