bundles / scipy 2.0.0.dev0+git20260907.41eeb59 / scipy / linalg / _flapack / cgbsv

lapack_function

`scipy.linalg._flapack:cgbsv`

source: build-install/usr/lib/python3.14/site-packages/scipy/linalg/_flapack.cpython-314-x86_64-linux-gnu.so

Signature

def cgbsv(kl, ku, ab, b, overwrite_ab = 0, overwrite_b = 0)

Summary

Solve a @ x = b for a banded a by LU factorization with partial pivoting (LAPACK cgbsv).

Parameters

kl : int: Number of subdiagonals.
ku : int: Number of superdiagonals.
ab : ndarray: Band storage of shape (2 * kl + ku + 1, n): a[i, j] is held at ab[ku + i - j, j].
b : ndarray: Right-hand side(s) of shape (n, nrhs).
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.

Returns

lub : ndarray: Combined L and U factors in band storage.
piv : ndarray: Pivot indices, 0-based: row i was interchanged with row piv[i].
x : ndarray: Solution of the system.
info : int: 0 on success; if negative, the -info-th argument had an illegal value; if positive, u[info-1, info-1] is exactly zero and the factor is singular.

Aliases

scipy.linalg._flapack.cgbsv