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<body class='hmmessage'><div dir='ltr'> I want to have multiple solutions which form a pareto frontier. I do understand that I should run the solver several times.<div>However, I thought Symphony has that function built in. I tried MCKP (bicriteria knapsack problems) application and it works. I also want to run other bicriteria problems which I don't know how to do that. </div><div><br></div><div>Thanks,</div><div>Papis<br><br><div>> Date: Wed, 11 Sep 2013 11:28:19 -0500<br>> From: hennebry@web.cs.ndsu.nodak.edu<br>> To: papis_31@hotmail.com<br>> CC: symphony@list.coin-or.org<br>> Subject: Re: [Symphony] biobjective problems<br>> <br>> On Wed, 11 Sep 2013, Papis Wongchaisuwat wrote:<br>> <br>> > Dear all, I am trying to run biobjective problems e.g. set cover, set pack problem. I searched the previous posting and it seems like biobjective MILPs does not work with gmpl file. What is the easiest way to run these problems? I am using linux but I am a new learner. It will be very helpful if someone can tell me exactly what I need to do (i.e. like step-by-step).<br>> <br>> MILP solvers are designed to give one a single solution.<br>> Biobjective problems generally do not have a single soluion.<br>> You will need to run the solver multiple times.<br>> To say much more would require knowing what you regard as a solution.<br>> <br>> -- <br>> Michael hennebry@web.cs.ndsu.NoDak.edu<br>> "On Monday, I'm gonna have to tell my kindergarten class,<br>> whom I teach not to run with scissors,<br>> that my fiance ran me through with a broadsword." -- Lily<br></div></div> </div></body>
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