Sam Isaacson

Do observed as normal equations work with pure jump models now? (i.e. do they get moved by MTK to being observed from being equations so one ends up with a...

I think Catalyst still needs to support a notion of observed so in Catalyst we can know that these aren't meant to be system equations that define dynamics. Not having...

Here, for example, are some dispatches we've had to define in Catalyst. I don't know that all of these are actually needed to avoid issues with an `AbstractSystem`, but a...

Yeah, we don’t currently support all the various ODEProblem type dispatches. If you want to specify such type information you should convert to an ODESystem for now.

One thing that Catalyst does that might be nice is to also support rational functions by converting them into polynomial systems. I think @TorkelE set this up with @shashi at...

You can always multiply through by the denominators to make the system polynomial. If you look at the Catalyst extension you can see what @TorkelE did. https://github.com/SciML/Catalyst.jl/blob/master/ext/CatalystHomotopyContinuationExtension/homotopy_continuation_extension.jl

Note, there is no reason not to leave rational systems for a follow up. Just having it on polynomial systems to start is nice!

@ChrisRackauckas it would be nice as part of this push to also have an API for people developing on top of MTK who may need access to some of the...

(That is another source of things breaking in non-breaking MTK releases we see quite frequently in Catalyst, which is our fault for using such functions, but really the only option...

If this is going to be added to the DSL why not add to the standalone macros too? Seems likely to be confusing to people otherwise.