`scipy.linalg._flapack:zpbtrf`

Summary

Compute the Cholesky factorization of a positive definite band matrix (LAPACK zpbtrf).

ab : ndarray: The band of the matrix, shape (kd + 1, n): the order n and the bandwidth kd are both read off ab itself.
lower : int, optional: If nonzero, the lower triangle of a is referenced and the factor is lower triangular; otherwise the upper. Default is 0.
ldab : int, optional: Leading dimension of ab. It must equal ab.shape[0]; the argument exists only because the .pyf exposed it. Default is ab.shape[0].
overwrite_ab : int, optional: If nonzero, ab may be overwritten in place. Default is 0.

c : ndarray: The banded Cholesky factor, overwriting ab.
info : int: 0 on success; if negative, the -info-th argument had an illegal value.