SYNOPSIS
 SUBROUTINE CPTTRSV(
 UPLO, TRANS, N, NRHS, D, E, B, LDB, INFO )
 CHARACTER UPLO, TRANS
 INTEGER INFO, LDB, N, NRHS
 REAL D( * )
 COMPLEX B( LDB, * ), E( * )
PURPOSE
CPTTRSV solves one of the triangular systemsL * X = B, or L**H * X = B,
U * X = B, or U**H * X = B,
where L or U is the Cholesky factor of a Hermitian positive definite tridiagonal matrix A such that
A = U**H*D*U or A = L*D*L**H (computed by CPTTRF).
ARGUMENTS
 UPLO (input) CHARACTER*1

Specifies whether the superdiagonal or the subdiagonal
of the tridiagonal matrix A is stored and the form of the
factorization:
= 'U': E is the superdiagonal of U, and A = U'*D*U;
= 'L': E is the subdiagonal of L, and A = L*D*L'. (The two forms are equivalent if A is real.)  TRANS (input) CHARACTER

Specifies the form of the system of equations:
= 'N': L * X = B (No transpose)
= 'N': L * X = B (No transpose)
= 'C': U**H * X = B (Conjugate transpose)
= 'C': L**H * X = B (Conjugate 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 CPTTRF.
 E (input) COMPLEX array, dimension (N1)
 The (n1) offdiagonal elements of the unit bidiagonal factor U or L from the factorization computed by CPTTRF (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