CXML
        	    
LAPACK version 3.0
dpbtrs(3)

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

SYNTAX
  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, * )

DESCRIPTION
  DPBTRS solves a system of linear equations A*X = B with a symmetric
  positive 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 j-th
	  column of 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