Multivariate Meijer G or Fox H-Functions

[brandon willard]

Is anyone working on multivariate Meijer G or Fox H functions?

[Aaron Meurer]

meijerg is already implemented
http://docs.sympy.org/latest/modules/functions/special.html#sympy.functions.special.hyper.meijerg.
I don't think Fox H is, though.

Aaron Meurer

On Tue, Apr 14, 2015 at 3:30 PM, brandon willard
<brandon...@gmail.com> wrote:
> Is anyone working on multivariate Meijer G or Fox H functions?
>

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[brandon willard]

Yes, this is what drew me to Sympy in the first place!

Now, I have the need to evaluate multivariate versions and wanted to work from that existing base.  I've been looking at the code, in order to start hacking the multivariate stuff, but wanted ask if anyone has already started/done such a thing.

[Aaron Meurer]

I don't see anything searching through the pull requests, and I don't
recall anyone saying they were, so I guess no. There are several pull
requests related to other special functions (esp.
https://github.com/sympy/sympy/pulls/raoulb), but I don't see anything
for Fox H or Meijer G.

Also, is the current meijerg not already multivariate?

Aaron Meurer

> https://groups.google.com/d/msgid/sympy/d8960b8e-a942-403b-86ce-a4a2819e7d93%40googlegroups.com.

[brandon willard]

It doesn’t appear to handle the multivariate case (e.g. as defined here for two vars).