Hullo GLPK List,
I've created another egregiously bad LP file, that I was hoping GLPK
could pare down better. For the most, it does, removing (byte-wise)
about 120 MiB from the LP file. However, I'm still seeing some
redundant or unusable terms. I'd expect for it to remove terms like these:
+ 0 x[3]
For reference, here's how I created the GLPK version of the LP file:
$ glpsol --version | head -1
GLPSOL: GLPK LP/MIP Solver, v4.43
$ glpsol --lp large_file.lp --wlp smaller_file.lp
$ ll large_file.lp smaller_file.lp
-rw-r--r-- 1 kevin kevin 294M 2010-11-06 14:20 large_file.lp
-rw-r--r-- 1 kevin kevin 172M 2010-11-06 14:24 smaller_file.lp
Am I incorrect in thinking that no matter where it is, a term multiplied
by 0 is effectively useless information? It is perhaps of note that I
only see any +0 terms in the objective function.
Thanks,
Kevin
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