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CGTTS2(1)	    LAPACK auxiliary routine (version 3.2)	     CGTTS2(1)

NAME
       CGTTS2  - solves one of the systems of equations	 A * X = B, A**T * X =
       B, or A**H * X = B,

SYNOPSIS
       SUBROUTINE CGTTS2( ITRANS, N, NRHS, DL, D, DU, DU2, IPIV, B, LDB )

	   INTEGER	  ITRANS, LDB, N, NRHS

	   INTEGER	  IPIV( * )

	   COMPLEX	  B( LDB, * ), D( * ), DL( * ), DU( * ), DU2( * )

PURPOSE
       CGTTS2 solves one of the systems of equations
	  A * X = B,  A**T * X = B,  or	 A**H * X  =  B,  with	a  tridiagonal
       matrix A using the LU factorization computed by CGTTRF.

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

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

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

       DL      (input) COMPLEX array, dimension (N-1)
	       The (n-1) multipliers that define the matrix L from the LU fac‐
	       torization of A.

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

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

       DU2     (input) COMPLEX array, dimension (N-2)
	       The (n-2) elements of the second super-diagonal of U.

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

 LAPACK auxiliary routine (versioNovember 2008			     CGTTS2(1)
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