Michael Bynum

LinearExpression should be immutable like all other expression nodes

3

## Summary/Motivation: As far as I know, `LinearExpression` is the only expression object in the expression system that is mutable. This PR updates `LinearExpression` so that it is immutable. ###...

Add a QuadraticExpression node

2

## Fixes #1761, #230. ## Summary/Motivation: This PR adds a `QuadraticExpression` node to the expression system. This PR does not add any special handling of `QuadraticExpression` (that can be added...

[WIP] Pyomo Model Plot

2

## Summary/Motivation: This PR adds a function to create a Plotly plot of the graph of a pyomo model. It is "interactive" in the sense that you get information about...

Provide a way to release license from persistent interface

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## Summary/Motivation: This PR adds a method to the Appsi Gurobi interface to delete the Gurobi model and release the license. ### Legal Acknowledgement By contributing to this software project,...

## Summary There is no need for the FBBT walker to descend into NPV expression nodes. Improving this logic would simplify the code and improve performance.

[PEP] NetworkX Graph Representation of Pyomo Model

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## Summary There are many applications in which it is useful to generate a graph representation of a pyomo model using NetworkX. It would be nice to have a single...

Cannot clone individual blocks within an indexed block

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## Summary `_BlockData` does not have a `_parent` attribute, so it cannot be cloned. ### Steps to reproduce the issue ``` In [1]: import pyomo.environ as pe In [2]: m...

We should try to detect empty pipes and issue a warning. These can cause incorrect negative pressures due to differences in elevation.