Got it:
As outlined in [1], what is mathematically perceived as a "function" is a
class in terms of sympy, not an instance thereof.
--Nico
[1] http://docs.sympy.org/latest/modules/functions/index.html
On Thursday, July 16, 2015 at 9:53:17 AM UTC+2, Nico wrote:
>
> Following up on question [1],
Yes, unfortunately, Function acts differently when subclassed.
What you want to do, I believe, is create a custom subclass of Function
with the metaclass UndefinedFunction. It's worth taking a look at the
source code of Function to see how it works.
Aaron Meurer
On Thu, Jul 16, 2015 at 4:31 AM,
