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Re: [Help-glpk] Asking help on an issue of solving via glpk

From: john tass
Subject: Re: [Help-glpk] Asking help on an issue of solving via glpk
Date: Tue, 9 Feb 2016 00:11:15 +0200

Thanks a lot to all of them who answered my question. 
Should I suppose that the answer to my question is negative, i.e. it is not possible to force GLPK to start searching from a particular point?
For your information, my project concerns the school timetabling problem. As I mentioned in my previous mail, I got a solution provided by Particle Swarm Optimization, but I do not know if this solution is optimal or not.
Any way, I found your answers very helpful. What I wrote in command prompt was :
glpsol --cuts --pcost --math my_model.mod --data my_data.dat --proxy 200 --mir --mipgap 0.2
The results were good and produced fast. 
Nevertheless, I mast say that I have no idea about what --cuts, --pcost, --proxy, --mir and --mipgap 0.2 mean or stand for.
Could any one inform me in a few words about the meaning of all these? Or better, is there any text explaining all these?
Please note that the asked information is very crucial to me, as I shall be in a position to explain the way or the method I followed in order to discover these better solutions, compared with those found by Particle Swarm optimization.
Thanks for one more time

2016-02-08 23:21 GMT+02:00 Noli Sicad <address@hidden>:
Hi  Johannes,

Try to use the proximity option and mipgap option as well, as
mentioned by Heinrich.

For example,

glpsol --math yourMIP_mathprog_model.mod --proxy 200 --mir --mipgap 0.2

Note: 200 in the example above is in seconds.

Reggards, Noli

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