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[Help-glpk] 213: No primal feasible solutions
From: |
ЦмСТ |
Subject: |
[Help-glpk] 213: No primal feasible solutions |
Date: |
Thu, 15 Jan 2009 12:03:38 +0300 |
Dear glpk maintaners,
We have met a problem when solving a MILP model, it is defined as below:
MIN = sum(ki, i = 1 .. m)
St:
K*y = 0
yj >= e
0 <= yi <= ki, kiЎК{0,1},1<=i<=m
K is a n*m coefficient matrix
y is a m*1 column vector of variables
The second line in constrains means that the j-th row of y should be a
positive, so e is boundary positive, which is small enough
The third line provides relationships bewteen continueous variables y and
binary variables k
Well, since m ЎЦ 500, n ЎЦ 30, I don #39;t think it failed because of large
amount of variables. So are we wrong or it is a bug of glpk?
the details of linear model is in the attachment.
Kind Regards
--
Yours, Yan Zhu
Institute of Microbiology, Chinense Academy of Sciences
Datun Rd.
Chaoyang District
Beijing 100101
P. R. China
Dear glpk maintaners,
We have met a problem when solving a MILP model, it is defined as below:
MIN = sum(ki, i = 1 .. m)
St:
K*y = 0
yj >= e
0 <= yi <= ki, ki¡Ê{0,1},1<=i<=m
K is a n*m coefficient matrix
y is a m*1 column vector of variables
The second line in constrains means that the j-th row of y should be a positive, so e is boundary positive, which is small enough
The third line provides relationships bewteen continueous variables y and binary variables k
Well, since m ¡Ö 500, n ¡Ö 30, I don't think it failed because of large amount of variables. So are we wrong or it is a bug of glpk?
the details of linear model is in the attachment.
Kind Regards
--
Yours, Yan Zhu
Institute of Microbiology, Chinense Academy of Sciences
Datun Rd.
Chaoyang District
Beijing 100101
P. R. China
linear model.txt
Description: Text document
- [Help-glpk] 213: No primal feasible solutions,
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