Alex Lindsay

I guess these things are potentially only used during Jacobian evaluation and not in the residual computation? E.g. one object may compute residual-related things and another object does Jacobian things?

There is some documentation in `NonlinearSystem.md`, however as that is neither a syntax index page nor a registered MOOSE object, that's not the best place for any documentation.

Here is what I think: 1. should do 2. should do, however I think there may be some hardship along the way. Sadly I think there's a reason that `Assembly::computingJacobian`...

In general I think computing the residual and Jacobian together will only be a win as the cost of computing the residual approaches the cost of computing the Jacobian or...

With the creation of the functor system, given a choice between traditional MOOSE materials and user objects, I would vote for user objects.

@grmnptr I am going to assign you as the lead on this because I will be out of town for the next two and a half weeks

draft until #21699 goes in because the new test I added for FV mortar doesn't pass with distributed mesh without the #21699 changes

@cpgr I was wondering if you looked at our porous Navier-Stokes slides at https://mooseframework.inl.gov/slides/index.html#/ whether you could tell me what the difference between that and the equations solved by the...

It's fun learning about this. A really dumb question that I haven't answered for myself yet: if you were to model a single phase single component problem, what would your...

Yea that's probably not quite right. The dof values should return all the degree of freedom values in the solution vector associated with a given element, whereas the coupled value...