`scipy.linalg._flapack:spbsv`

Summary

Solve a positive definite band system by Cholesky factorization (LAPACK spbsv).

ab : ndarray: The band of the matrix, shape (kd + 1, n): the order n and the bandwidth kd are both read off ab itself.
b : ndarray: Right-hand side(s) of shape (n, nrhs).
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.
overwrite_b : int, optional: If nonzero, b may be overwritten in place. Default is 0.

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