NAME

SYNOPSIS

  SUBROUTINE DPBTRS( UPLO, N, NDIAG, NRHS, A, LDA, B, LDB, INFO)
  CHARACTER * 1 UPLO
  INTEGER N, NDIAG, NRHS, LDA, LDB, INFO
  DOUBLE PRECISION A(LDA,*), B(LDB,*)
 
  SUBROUTINE DPBTRS_64( UPLO, N, NDIAG, NRHS, A, LDA, B, LDB, INFO)
  CHARACTER * 1 UPLO
  INTEGER*8 N, NDIAG, NRHS, LDA, LDB, INFO
  DOUBLE PRECISION A(LDA,*), B(LDB,*)
 

F95 INTERFACE

  SUBROUTINE PBTRS( UPLO, [N], NDIAG, [NRHS], A, [LDA], B, [LDB], 
 *       [INFO])
  CHARACTER(LEN=1) :: UPLO
  INTEGER :: N, NDIAG, NRHS, LDA, LDB, INFO
  REAL(8), DIMENSION(:,:) :: A, B
 
  SUBROUTINE PBTRS_64( UPLO, [N], NDIAG, [NRHS], A, [LDA], B, [LDB], 
 *       [INFO])
  CHARACTER(LEN=1) :: UPLO
  INTEGER(8) :: N, NDIAG, NRHS, LDA, LDB, INFO
  REAL(8), DIMENSION(:,:) :: A, B
 

C INTERFACE

void dpbtrs(char uplo, int n, int ndiag, int nrhs, double *a, int lda, double *b, int ldb, int *info);

void dpbtrs_64(char uplo, long n, long ndiag, long nrhs, double *a, long lda, double *b, long ldb, long *info);

PURPOSE

ARGUMENTS

* UPLO (input)

* N (input)

The order of the matrix A. N >= 0.

* NDIAG (input)

The number of superdiagonals of the matrix A if UPLO = 'U', or the number of subdiagonals if UPLO = 'L'. NDIAG >= 0.

* NRHS (input)

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

* A (input)

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 NDIAG+1 rows of the array. The j-th column of U or L is stored in the j-th column of the array A as follows: if UPLO ='U', A(kd+1+i-j,j) = U(i,j) for max(1,j-kd)<=i<=j; if UPLO ='L', A(1+i-j,j) = L(i,j) for j<=i<=min(n,j+kd).

* LDA (input)

The leading dimension of the array A. LDA >= NDIAG+1.

* B (input/output)

On entry, the right hand side matrix B. On exit, the solution matrix X.

* LDB (input)

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

* INFO (output)