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[Help-glpk] a question about row dual value
From: |
zhihao cen |
Subject: |
[Help-glpk] a question about row dual value |
Date: |
Wed, 22 Oct 2008 04:40:07 +0300 |
Hello
I have the following small question ( in cpx_lp form )
====================
Minimize
obj: + 0.191747629717657 x_1 + x_3
Subject To
r_1: + x_2 - x_1 = 2
r_2: + x_3 + 0.216119012198317 x_2 >= 0.432238024396634
Bounds
0 <= x_1 <= 1
-1 <= x_2 <= 2
x_3 free
End
================
The row dual value for r_1 is 0, for which I have a question.
In fact, when I change 2 to 1.99999, I get the dual value for r_1 is -0.191748
which I want.
I know there is no solution when RHS of r_1 bigger than 2. But I am interested
in the case that it is less than 2.
I want to know if there is a way to get -0.191748 without changing the RHS
value of r_1.
Thanks
Hello
I have the following small question ( in cpx_lp form )
====================
Minimize
obj: + 0.191747629717657 x_1 + x_3
Subject To
r_1: + x_2 - x_1 = 2
r_2: + x_3 + 0.216119012198317 x_2 >= 0.432238024396634
Bounds
0 <= x_1 <= 1
-1 <= x_2 <= 2
x_3 free
End
================
The row dual value for r_1 is 0, for which I have a question.
In fact, when I change 2 to 1.99999, I get the dual value for r_1 is -0.191748 which I want.
I know there is no solution when RHS of r_1 bigger than 2. But I am interested in the case that it is less than 2.
I want to know if there is a way to get -0.191748 without changing the RHS value of r_1.
Thanks
- [Help-glpk] a question about row dual value,
zhihao cen <=