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Re: [Help-glpk] Modelling Advice Request - Project Tasks
From: |
Yingjie Lan |
Subject: |
Re: [Help-glpk] Modelling Advice Request - Project Tasks |
Date: |
Fri, 22 Jan 2010 19:05:45 -0800 (PST) |
> Here is my version of the LOP solver
> based on "lazy" constraint
> generation; please see the attachment. It is able to solve
> instances
> having up to 100 nodes. The code requires glpk v4.42.
I am really excited about it, now here is a row generation
code example! I looked into the code, and there is a question
concerning this block of code:
void callback(glp_tree *T, void *info)
{ xassert(info == info);
if (glp_ios_reason(T) == GLP_IROWGEN)
{ remove_inactive(T);
if (generate_rows() == 0)
remove_inactive(T);
}
return;
}
I don't quite understand the second remove_inactive(T) call:
it seems to me the second remove_inactive(T) won't do anything,
or am I missing something? Could you explain it a little bit?
Thanks!
Yingjie
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Andrew Makhorin, 2010/01/20
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Andrew Makhorin, 2010/01/20
Re: [Help-glpk] Modelling Advice Request - Project Tasks, jeff . kantor, 2010/01/21
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Andrew Makhorin, 2010/01/22
- Re: [Help-glpk] Modelling Advice Request - Project Tasks,
Yingjie Lan <=
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Jeffrey Kantor, 2010/01/25
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Andrew Makhorin, 2010/01/26
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Andrew Makhorin, 2010/01/26
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Yingjie Lan, 2010/01/26
Re: [Help-glpk] Modelling Advice Request - Project Tasks, Jeffrey Kantor, 2010/01/26