CXML
        	    
LAPACK version 3.0
zptsv(3)

PURPOSE
  ZPTSV - compute the solution to a complex system of linear equations A*X =
  B, where A is an N-by-N Hermitian positive definite tridiagonal matrix, and
  X and B are N-by-NRHS matrices

SYNTAX
  SUBROUTINE ZPTSV( N, NRHS, D, E, B, LDB, INFO )

      INTEGER	    INFO, LDB, N, NRHS

      DOUBLE	    PRECISION D( * )

      COMPLEX*16    B( LDB, * ), E( * )

DESCRIPTION
  ZPTSV computes the solution to a complex system of linear equations A*X =
  B, where A is an N-by-N Hermitian positive definite tridiagonal matrix, and
  X and B are N-by-NRHS matrices.  A is factored as A = L*D*L**H, and the
  factored form of A is then used to solve the system of equations.

ARGUMENTS
  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
	  matrix B.  NRHS >= 0.

  D	  (input/output) DOUBLE PRECISION array, dimension (N)
	  On entry, the n diagonal elements of the tridiagonal matrix A.  On
	  exit, the n diagonal elements of the diagonal matrix D from the
	  factorization A = L*D*L**H.

  E	  (input/output) COMPLEX*16 array, dimension (N-1)
	  On entry, the (n-1) subdiagonal elements of the tridiagonal matrix
	  A.  On exit, the (n-1) subdiagonal elements of the unit bidiagonal
	  factor L from the L*D*L**H factorization of A.  E can also be
	  regarded as the superdiagonal of the unit bidiagonal factor U from
	  the U**H*D*U factorization of A.

  B	  (input/output) COMPLEX*16 array, dimension (LDB,N)
	  On entry, the N-by-NRHS right hand side matrix B.  On exit, if INFO
	  = 0, the N-by-NRHS solution matrix X.

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

  INFO	  (output) INTEGER
	  = 0:	successful exit
	  < 0:	if INFO = -i, the i-th argument had an illegal value
	  > 0:	if INFO = i, the leading minor of order i is not positive
	  definite, and the solution has not been computed.  The
	  factorization has not been completed unless i = N.