`scipy.linalg._flapack:zpbtrs`

Summary

Solve a positive definite band system using a Cholesky factorization already computed by pbtrf (LAPACK zpbtrs).

ab : ndarray: Banded Cholesky factor, as returned by pbtrf.
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_b : int, optional: If nonzero, b may be overwritten in place. Default is 0.

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