[Cbc] Fixing variables

[Ted Ralphs]

The preprocessor tries to figure out if variables can be fixed, even for
variables whose upper and lower bounds are not explicitly equal. I don't
imagine there would be much gain from re-modeling.

Ted

On Fri, Mar 6, 2020 at 12:08 PM Daniel Grace <danwgrace at gmail.com> wrote:

> Hi,
>
> Say I have a problem (model) MIP or ILP and I want to fix some variables,
> rather than remodel the problem with such variables replaced by their
> respective values i.e. by setting each corresponding column upper value and
> column lower value to matching values. Does CBC deal with such variables
> efficiently, or is it better to remodel the problem?
>
> Thanks
>
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-- 
Dr. Ted Ralphs
Professor, Industrial and Systems Engineering
Lehigh University
(610) 628-1280
ted 'at' lehigh 'dot' edu
coral.ie.lehigh.edu/~ted
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