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by UserCplex
27 Feb 2018, 08:59
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Sure. Attaching the zipped file.
by UserCplex
27 Feb 2018, 06:51
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Sure Thomas. Here is the code to get the facets once I have the integer lattice points (3104 in number) The files accessed in code above are output from cplex and they are provided as attachment. OOps...I am unable to attach the files, since they are too large for the system 1.3 MB in size. Roughly ...
by UserCplex
27 Feb 2018, 02:48
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Hi opfer,

Thank you very much for the inputs. They are very helpful.
by UserCplex
26 Feb 2018, 17:14
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Hi joswig and gawrilow: My intention was never to request help from you regarding CPLEX. This was more a question about the polyhedral aspect of the problem in the OP -- an IP's solution is 178 and yet the LP relaxed solution of the same problem with added facets did not return the same solution of ...
by UserCplex
26 Feb 2018, 12:22
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Okay. I will try as you suggest. In the meantime, assuming you have access to an MIP solver (and therefore an LP solver) at your end that can read in the files I provided in the OP, I would be really grateful if any of the polymake developers can verify if the discrepancy exists on 3.2. My OP is det...
by UserCplex
26 Feb 2018, 11:59
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Re: Discrepancy in computing facets of a mixed integer program

Hello, Thank you. I am new to linux actually and am having sufficient struggle getting my system to work with various dependencies, etc. So, I don't want to install a time consuming polymake3.2 just yet. Is it possible for me to run the steps provided in https://polymake.org/doku.php/tutorial/optimi...
by UserCplex
26 Feb 2018, 10:58
Forum: Helpdesk
Topic: Discrepancy in computing facets of a mixed integer program
Replies: 29
Views: 22618

Discrepancy in computing facets of a mixed integer program

Hello, Attached is a mixed-integer program in .lp format "problemIP.lp" The optimal solution is 178 which I compute using CPLEX software. I enumerate all feasible points of this mixed integer program using my own method outside of polymake and it lists 3104 points. Then, using polymake, I ...
by UserCplex
12 Jan 2018, 16:18
Forum: Helpdesk
Topic: Error: Input Polytope must be bounded
Replies: 4
Views: 6001

Re: Error: Input Polytope must be bounded

The question got resolved and this post of mine is a bit tangential. Hence, I have chosen to delete it.

Thanks.
by UserCplex
12 Jan 2018, 10:58
Forum: Helpdesk
Topic: Error: Input Polytope must be bounded
Replies: 4
Views: 6001

Re: Error: Input Polytope must be bounded

The question got resolved and this post of mine is a bit tangential. Hence, I have chosen to delete it.

Thanks.
by UserCplex
12 Jan 2018, 01:20
Forum: Helpdesk
Topic: Error: Input Polytope must be bounded
Replies: 4
Views: 6001

Error: Input Polytope must be bounded

The question got resolved and this post of mine is a bit tangential. Hence, I have chosen to delete it.

Thanks.

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