functional.py 文件源码

def det(var):
    r"""Calculates determinant of a 2D square Variable.

    .. note::
        Backward through `det` internally uses SVD results. So double backward
        through `det` will need to backward through :meth:`~Tensor.svd`. This
        can be unstable in certain cases. Please see :meth:`~torch.svd` for
        details.

    Arguments:
        var (Variable): The input 2D square Variable.
    """
    if torch.is_tensor(var):
        raise ValueError("det is currently only supported on Variable")
    return var.det()