DPBTRS(l)		LAPACK routine (version	1.1)		    DPBTRS(l)

NAME
  DPBTRS - solve a system of linear equations A*X = B with a symmetric posi-
  tive definite	band matrix A using the	Cholesky factorization A = U**T*U or
  A = L*L**T computed by DPBTRF

SYNOPSIS

  SUBROUTINE DPBTRS( UPLO, N, KD, NRHS,	AB, LDAB, B, LDB, INFO )

      CHARACTER	     UPLO

      INTEGER	     INFO, KD, LDAB, LDB, N, NRHS

      DOUBLE	     PRECISION AB( LDAB, * ), B( LDB, *	)

PURPOSE
  DPBTRS solves	a system of linear equations A*X = B with a symmetric posi-
  tive definite	band matrix A using the	Cholesky factorization A = U**T*U or
  A = L*L**T computed by DPBTRF.

ARGUMENTS

  UPLO	  (input) CHARACTER*1
	  = 'U':  Upper	triangular factor stored in AB;
	  = 'L':  Lower	triangular factor stored in AB.

  N	  (input) INTEGER
	  The order of the matrix A.  N	>= 0.

  KD	  (input) INTEGER
	  The number of	superdiagonals of the matrix A if UPLO = 'U', or the
	  number of subdiagonals if UPLO = 'L'.	 KD >= 0.

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

  AB	  (input) DOUBLE PRECISION array, dimension (LDAB,N)
	  The triangular factor	U or L from the	Cholesky factorization A =
	  U**T*U or A =	L*L**T of the band matrix A, stored in the first KD+1
	  rows of the array.  The j-th column of U or L	is stored in the
	  array	AB as follows: if UPLO ='U', AB(kd+1+i-j,j) = U(i,j) for
	  max(1,j-kd)<=i<=j; if	UPLO ='L', AB(1+i-j,j)	  = L(i,j) for
	  j<=i<=min(n,j+kd).

  LDAB	  (input) INTEGER
	  The leading dimension	of the array AB.  LDAB >= KD+1.

  B	  (input/output) DOUBLE	PRECISION array, dimension (LDB,NRHS)
	  On entry, the	right hand side	matrix B.  On exit, the	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