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by assarf
04 Mar 2015, 17:43
Forum: News
Topic: Polymake release 2.14
Replies: 0
Views: 39833

Polymake release 2.14

We are happy to announce that the new polymake version 2.14 is there! Download it here or at GitHub . The list of changes can be found here: ChangeLog . Changes include: support for perl 5.20 support for MacOS 10.10 new client for hadamard product of matrices some refactoring of application matroid ...
by assarf
24 Feb 2015, 13:40
Forum: Installing polymake
Topic: cddio.c) make problem
Replies: 9
Views: 12059

Re: cddio.c) make problem

hmm the attachment did not come though somehow. Would you be so kind and try it again? :?
by assarf
17 Feb 2015, 16:38
Forum: General Discussion
Topic: Computing perimeter, surface area, diameter ...
Replies: 2
Views: 20396

Re: Computing perimeter, surface area, diameter ...

Hi there,

at the moment there is nothing of those properties implemented except for VOLUME (which only works for full dimensional polytopes and is the area when your polytope is 2-dimensional).
by assarf
11 Feb 2015, 17:20
Forum: Helpdesk
Topic: Function gc_closure
Replies: 1
Views: 3392

Re: Function gc_closure

Hi there, without investigating your examples in great detail, I think there is a misunderstanding here. The function \(\texttt{gc_closure}\) does not compute the integer hull. It just does one iteration step. Doing the first gomory chvatal closure means: take all inequalities induced by the hilbert...
by assarf
12 Jan 2015, 10:31
Forum: Helpdesk
Topic: no visualization - problem with jreality?
Replies: 7
Views: 8162

Re: no visualization - problem with jreality?

I installed polymake in a virtual box ubuntu without any problems. jReality works, too.
I suppose you have the newest ubuntu inside the newest virtual box with guest additions?

are you using polymake 2.13 or the beta-version?
by assarf
08 Jan 2015, 16:23
Forum: Helpdesk
Topic: no visualization - problem with jreality?
Replies: 7
Views: 8162

Re: no visualization - problem with jreality?

what virtual machine do you use?
by assarf
29 Dec 2014, 11:31
Forum: Helpdesk
Topic: Polytope Containment
Replies: 13
Views: 13292

Re: Polytope Containment

try using the function:

Code: Select all

included_polyhedra (P1, P2) → Bool Tests if polyhedron P1 is included in polyhedron P2. Parameters Polytope P1 the first polytope Polytope P2 the second polytope Returns Bool 'true' if P1 is included in P2, 'false' otherwise
by assarf
15 Dec 2014, 17:27
Forum: General Discussion
Topic: Sampling points in a polytope
Replies: 6
Views: 24426

Re: Sampling points in a polytope

Hi, first of all: when you use the lp2poly script you will get a polytope with floating point coordinates. As floats are "evil" you might want to calculate with Rationals instead. So use: $p = convert_to<Rational>(lp2poly('test.lp')); as described here or you input the inequalities directl...
by assarf
15 Dec 2014, 15:00
Forum: General Discussion
Topic: Sampling points in a polytope
Replies: 6
Views: 24426

Re: Sampling points in a polytope

no, there is nothing for unbounded polyhedra. one thing you can do is to transform your polyhedron via a projective transformation into a bounded polytope, use one of the two functions above and reverse the transformation afterwards. Or you could produce random convex combinations on your own. eithe...
by assarf
15 Dec 2014, 10:33
Forum: General Discussion
Topic: Sampling points in a polytope
Replies: 6
Views: 24426

Re: Sampling points in a polytope

Hi there, I do not know the "hit-and-run sampling method". At least the name of the method does not ring a bell. But maybe this is what you search? rand_inner_points(P, n; Options) -> Polytope Produce a polytope with n random points from the input polytope P. Each generated point is a conv...

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