John Siirola

FWIW, I think the "correct" solution is the use of `param_3` to make the base dimensionless. I think there is a fundamental conceptual problem if the meaning of a value...

I think you can think of an empirical correlation in much the same way as an external function: it is something that takes values with known units and produces a...

@michaelbynum has been developing a new framework for the persistent interfaces (see the solver-rewrite branches on his and my forks). I would suggest coordinating with him and basing your work...

@ZedongPeng, to my knowledge, no one is actively working on this (although I agree it would be really nice to have).

I was thinking about this when implementing it. The question in my mind is if `equality` should be "structurally" or "effectively". That is, consider: ```python model.x = Var() model.l =...

@bknueven, while #2097 resolves this specific behavior, I am not at all clear how you are getting a `RangedExpression` in your constraint to begin with. Can you share your model...

This appears to be an issue with Python's subprocess within reticulate. A little googling (see [here](https://stackoverflow.com/questions/63016429/subprocess-run-works-from-python-but-not-when-using-r-and-reticulate), which references [here](https://stackoverflow.com/questions/40108816/python-running-as-windows-service-oserror-winerror-6-the-handle-is-invalid)). Unfortunately, none of the development team works with R / reticulate,...

@notesofdabbler: Thanks for reminding me of that! For the record, those lines are only necessary for Pyomo < 6.0. Starting in 6.0, Pyomo no longer has a dependence on PyUtilib...

@AlexanderMeisinger: sorry, I should have mentioned that that patch is against the main Pyomo development branch. It should work for any version of Pyomo > 6.0. If you are still...

I think a `QuadraticExpression` node can make a lot of sense. However, I wonder if this is the right data structure, or rather if the right answer is to store...