def _nullspace(A: Tensor) -> Tuple[Tensor, Tensor]:
    """Compute the null space of A.

    Return the smallest singular value and the corresponding vector.
    """
    _, s, v = _torch_svd_cast(A)
    return s[..., -1], v[..., -1]
Compute the null space of A.

    Return the smallest singular value and the corresponding vector.
    
kornia/geometry/epipolar/projection.py