SciPy

What happened:

linspace gives a division by zero error, when NumPy returns an empty array on the same input.

What you expected to happen:

Behaviour the same as NumPy.

Minimal Complete Verifiable Example:

>>> import numpy as np
>>> np.linspace(0, 0, 0, endpoint=False)
array([], dtype=float64)
>>> import dask.array as da
>>> da.linspace(0, 0, 0, endpoint=F

Is possible know the mathematical definition of this function?
scipy.special.chndtr
scipy.special.chndtrix

Also this functions:
scipy.special.nctdtr
scipy.special.nctdtrit

Description

Calling vectorize with a non-None value for the signature parameter outputs this error message about the excluded parameter.

NotImplementedError: cupy.vectorize does not support `excluded` option currently.

Inspecting the code, it is obvious there is a copy-paste error and the 2nd error message should be change excluded to signature.

https://github.com/cupy/c

Description of the desired feature

The spacing parameter of the rolling_window function controls the distance between the center of two adjacent windows.
Nevertheless, the docstring reads:

    spacing : float, tuple = (s_north, s_east), or None
        The window size in the South-North and West-East directions,
        respectively. A single value means that the size is equal