`scipy.linalg._flapack:zptsv`

Signature

def zptsv(d, e, b, overwrite_d = 0, overwrite_e = 0, overwrite_b = 0)

Solve a @ x = b for a positive definite tridiagonal a by its L @ D @ L.conj().T factorization (LAPACK zptsv).

d : ndarray: Diagonal of the matrix, length n. Real for every flavor.
e : ndarray: Off-diagonal, length max(0, n - 1).
b : ndarray: Right-hand side(s) of shape (n, nrhs).
overwrite_d : int, optional: If nonzero, d may be overwritten in place. Default is 0.
overwrite_e : int, optional: If nonzero, e may be overwritten in place. Default is 0.
overwrite_b : int, optional: If nonzero, b may be overwritten in place. Default is 0.

d : ndarray: Diagonal of D from the factorization.
du : ndarray: Off-diagonal of L, written over e.
x : ndarray: Solution of the system.
info : int: 0 on success; if negative, the -info-th argument had an illegal value; if positive, the leading minor of order info is not positive definite.