Ticket #4489 (new minor enhancement)

Opened 5 years ago

Last modified 4 years ago

Modify PySP to cache modeler-fixed variables prior to PH iteration 0

Reported by: jwatson Owned by: jwatson
Priority: normal Milestone: Pyomo 4.x
Component: pyomo.pysp Version:
Keywords: Cc: dlwoodruff@…

Description

Some PH extensions, such as the lower bound extension, will need to free variables prior to sub-problem solves. However, we don't want to free all variables, but rather only those that PH fixed. Variables that a modeler fixed prior to running PH should always be fixed in such cases. We need a simple method added to PH that will cache the fixed variables following initialization, so that PH extensions can use this information.

Change History

comment:1 Changed 4 years ago by wehart

  • Milestone changed from Pyomo 4.0 to Pyomo 4.x
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