[Help-glpk] Announcement: PyMathProg 0.2.2 released!

2009-08-27 Thread Yingjie Lan
This is an improvement release, completed and demonstrated the access of the name, primal and dual values of constraints. http://pymprog.sf.net/ What is PyMathProg? === PyMathProg: easy GLPK in Python! PyMathProg is a Python reincarnation of AMPL and GNU MathProg modeling

[Help-glpk] Multiobjective problem

2009-08-27 Thread Davide Anghinolfi
Hi, I'm trying to face a multiobjective problem with lexicographic goals. The approach I'm implementing is to optimize the first goal, fix the columns involved in this goal, and proceed to the following goal. This works well. The problem is that subsequently I need to reoptimize: so I have to free

Re: [Help-glpk] Multiobjective problem

2009-08-27 Thread Andrew Makhorin
I'm trying to face a multiobjective problem with lexicographic goals. The approach I'm implementing is to optimize the first goal, fix the columns involved in this goal, and proceed to the following goal. This works well. The problem is that subsequently I need to reoptimize: so I have to