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27 Jul 2021, 12:19
Forum: Helpdesk
Topic: Checking if two fans have the same support
Replies: 1
Views: 66

### Re: Checking if two fans have the same support

Indeed, currently polymake does not have such a function. Of course, it is absolutely desirable. We started to discuss the matter within the developer's team. There are several ways to implement this, all of which are computationally costly, except for small fans in very low dimensions. We are in th...
11 Jun 2021, 17:16
Forum: Helpdesk
Topic: Stable intersection not contained in set-theoretic intersection
Replies: 6
Views: 284

### Re: Stable intersection not contained in set-theoretic intersection

That's a difficult question in the sense that these functions reside in Simon Hampe's extension atint, which became bundled a while ago. Thing is: no-one is currently working on that code.

Nonetheless, we will check. Just be a bit patient, please.
02 Jun 2021, 09:23
Forum: Helpdesk
Topic: Issues solving an LP
Replies: 6
Views: 715

### Re: Issues solving an LP

polymake employs a homogeneous coordinate model. That is, here and elsewhere you need to ignore the leading "1" in the solution.
20 May 2021, 09:29
Forum: Helpdesk
Topic: Issues solving an LP
Replies: 6
Views: 715

There are two issues. (1) There is a small glitch in polymake's design of subobject properties (such as LP or MILP). The following works: > $x = lp2poly("untitled.lp"); >$obj= new Vector([1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]); > $x->MILP(LINEAR_OBJECTIVE=... 24 Apr 2021, 18:31 Forum: Helpdesk Topic: How to define Matrix Group from generators? Replies: 3 Views: 447 ### Re: How to define Matrix Group from generators? There is no actual support of matrix groups in polymake. Our groups are usually permutation groups. There is only some very limited functionality to convert between matrices and permutations. If you need the full strength of matrix groups (and polyhedral geometry) you should use Oscar , which will b... 16 Apr 2021, 09:33 Forum: Helpdesk Topic: Segmentation fault when using Polymake in Julia Replies: 8 Views: 630 ### Re: Segmentation fault when using Polymake in Julia That polyhedron is unbounded; so the function says it cannot count the lattice points. Notice the extra inequality "1 0 0" (which amounts to 1 >= 0) that was added by polymake to your input. This is useful for combinatorial reasons: https://polymake.org/doku.php/user_guid ... oordinates 15 Apr 2021, 13:10 Forum: Helpdesk Topic: Segmentation fault when using Polymake in Julia Replies: 8 Views: 630 ### Re: Segmentation fault when using Polymake in Julia Does this also happen with julia-1.6? https://julialang.org/downloads/ 13 Apr 2021, 10:24 Forum: Helpdesk Topic: Trouble interpreting the output (facets of a polytope) Replies: 6 Views: 594 ### Re: Trouble interpreting the output (facets of a polytope) Please send your full input and output, at least for a minimal example which exhibits the problem. 23 Dec 2020, 12:51 Forum: Helpdesk Topic: Documentation for file command line interface Replies: 3 Views: 1512 ### Re: Documentation for file command line interface The following variant of the tutorial code is more generic and thus probably even better suited for your needs: Code: Select all polymake 'my$c=load("c3.poly"); print "$_\n",$c->\$_, "\n\n" for "N_VERTICES", "N_FACETS";' 
You can add as many properties as you like.
21 Oct 2020, 09:52
Forum: Helpdesk
Topic: Tropical Polytope Visualization
Replies: 1
Views: 1170

### Re: Tropical Polytope Visualization

Please give more details: which polymake version on which operating system are you running? Which visualization backend?

Also please give the entire sequence of commands leading to the error.

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