SYNOPSIS
 SUBROUTINE DPTTRSV(
 TRANS, N, NRHS, D, E, B, LDB, INFO )
 CHARACTER TRANS
 INTEGER INFO, LDB, N, NRHS
 DOUBLE PRECISION D( * )
 DOUBLE PRECISION B( LDB, * ), E( * )
PURPOSE
DPTTRSV solves one of the triangular systemsL**T* X = B, or L * X = B, where L is the Cholesky factor of a Hermitian positive
definite tridiagonal matrix A such that
A = L*D*L**H (computed by DPTTRF).
ARGUMENTS
 TRANS (input) CHARACTER

Specifies the form of the system of equations:
= 'N': L * X = B (No transpose)
= 'T': L**T * X = B (Transpose)  N (input) INTEGER
 The order of the tridiagonal 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) REAL array, dimension (N)
 The n diagonal elements of the diagonal matrix D from the factorization computed by DPTTRF.
 E (input) COMPLEX array, dimension (N1)
 The (n1) offdiagonal elements of the unit bidiagonal factor U or L from the factorization computed by DPTTRF (see UPLO).
 B (input/output) COMPLEX 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 ith argument had an illegal value