dgtts2.f(3)							      LAPACK							       dgtts2.f(3)

NAME

       dgtts2.f -

SYNOPSIS

   Functions/Subroutines
       subroutine dgtts2 (ITRANS, N, NRHS, DL, D, DU, DU2, IPIV, B, LDB)
	   DGTTS2 solves a system of linear equations with a tridiagonal matrix using the LU factorization computed by sgttrf.

Function/Subroutine Documentation
   subroutine dgtts2 (integerITRANS, integerN, integerNRHS, double precision, dimension( * )DL, double precision, dimension( * )D, double
       precision, dimension( * )DU, double precision, dimension( * )DU2, integer, dimension( * )IPIV, double precision, dimension( ldb, * )B,
       integerLDB)
       DGTTS2 solves a system of linear equations with a tridiagonal matrix using the LU factorization computed by sgttrf.

       Purpose:

	    DGTTS2 solves one of the systems of equations
	       A*X = B	or  A**T*X = B,
	    with a tridiagonal matrix A using the LU factorization computed
	    by DGTTRF.

       Parameters:
	   ITRANS

		     ITRANS is INTEGER
		     Specifies the form of the system of equations.
		     = 0:  A * X = B  (No transpose)
		     = 1:  A**T* X = B	(Transpose)
		     = 2:  A**T* X = B	(Conjugate transpose = Transpose)

	   N

		     N is INTEGER
		     The order of the matrix A.

	   NRHS

		     NRHS is INTEGER
		     The number of right hand sides, i.e., the number of columns
		     of the matrix B.  NRHS >= 0.

	   DL

		     DL is DOUBLE PRECISION array, dimension (N-1)
		     The (n-1) multipliers that define the matrix L from the
		     LU factorization of A.

	   D

		     D is DOUBLE PRECISION array, dimension (N)
		     The n diagonal elements of the upper triangular matrix U from
		     the LU factorization of A.

	   DU

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

	   DU2

		     DU2 is DOUBLE PRECISION array, dimension (N-2)
		     The (n-2) elements of the second super-diagonal of U.

	   IPIV

		     IPIV is INTEGER array, dimension (N)
		     The pivot indices; for 1 <= i <= n, row i of the matrix was
		     interchanged with row IPIV(i).  IPIV(i) will always be either
		     i or i+1; IPIV(i) = i indicates a row interchange was not
		     required.

	   B

		     B is DOUBLE PRECISION array, dimension (LDB,NRHS)
		     On entry, the matrix of right hand side vectors B.
		     On exit, B is overwritten by the solution vectors X.

	   LDB

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

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 129 of file dgtts2.f.

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

Version 3.4.2							  Tue Sep 25 2012						       dgtts2.f(3)