Checking the KroneckerProduct[] Skeletal Version

As before with Undefined although there is code to wrote, we have entered enough to be able to see that the builtin has been added, and that we can get some information about it.

So again, let us try this much. Fire up a a version Django interface that has access to the development version of mathics-core

$ cd Mathics3/mathics-django
$ make runserver
Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).
August 21, 2022 - 01:19:05
Django version 4.0.5, using settings 'mathics_django.settings'
Starting development server at

Connect to or the address above and go into the “about” section and see that you are using right version of mathics core.

Finally click the “?” at the extreme right and type “Undef”. You should see the information that you added in the docstring:

help for the built-in function "KroneckerProduct" in Mathics Django

You should check the following links shown in blue:

  • Kronecker product,

  • SymPy, and

  • WMA

to make sure these all go to the right place.

Now click on the following entry Normalize. At the time of this writing there is no preceding entry.

Now let’s test. Go into Django and type “Vector Space Operations” in the documentation section and you should see KroneckerProduct appear first before Normalize.

Click on “KroneckerProduct” in that list and we now see all of the information in the docstring we just entered.