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by joswig
12 Aug 2020, 09:22
Forum: Helpdesk
Topic: "det" in pdl and "det" in polymake
Replies: 5
Views: 403

Re: "det" in pdl and "det" in polymake

I am glad you found something useful in polymake. Let me point out that polymake scripts differ slightly from general perl scripts. They should start out with something like use application "polytope"; to set the scope (i.e., the active application). polymake's determinant function lives in the appl...
by joswig
11 Aug 2020, 16:51
Forum: Helpdesk
Topic: "det" in pdl and "det" in polymake
Replies: 5
Views: 403

Re: "det" in pdl and "det" in polymake

Is there a way to tell polymake to use the polymake det function? This is impossible to answer without seeing your script. I do not know about pdl. That is, if you would post that script, it might require a bit of explanation. If not, is there is an efficient way to compute the multiplicity of a se...
by joswig
31 Mar 2020, 14:04
Forum: General Discussion
Topic: building SubdivisionOfPoints from C++
Replies: 5
Views: 1633

Re: building SubdivisionOfPoints from C++

I should say that

Code: Select all

perl::Object
is outdated now. In version 4.0 this was replaced by

Code: Select all

BigObject
; no perl:: anymore.

To get an idea I would recommend to look at code in polymake's source, e.g., normal_fan.cc. While that is about a different big object type, its use is similar.
by joswig
10 Mar 2020, 17:37
Forum: Helpdesk
Topic: Porting old code
Replies: 3
Views: 1521

Re: Porting old code

... I can now tell you that polymake 4.0r1 will be in Fedora 32 ...
That's excellent! thanks for your effort. -- Michael
by joswig
09 Mar 2020, 18:02
Forum: Helpdesk
Topic: Computing one interior lattice points of possibly unbounded polytopes
Replies: 3
Views: 1061

Re: Computing one interior lattice points of possibly unbounded polytopes

Via SCIP (and tosimplex) polymake can solve arbitrary (mixed) integer linear programs.
Please look at the code for MIN_WEIGHTS in apps/fan/rules/subdivision.rules for an example which you can modify to your needs.
by joswig
09 Mar 2020, 17:36
Forum: Helpdesk
Topic: Computing one interior lattice points of possibly unbounded polytopes
Replies: 3
Views: 1061

Re: Computing one interior lattice points of possibly unbounded polytopes

polymake 4.0 comes with a new function which solves your very problem! fan > print $HC33->MIN_WEIGHTS; polymake: used package scip SCIP - Solving Constraint Integer Programs SCIP is a solver for Mixed Integer Linear and Nonlinear Problems that allows for an easy integration of arbitrary constraints....
by joswig
30 Jan 2020, 10:55
Forum: News
Topic: polymake 4.0 released
Replies: 0
Views: 4380

polymake 4.0 released

This is to announce the release of polymake 4.0. We bumped up the version major number in order to mark a few breaking changes, which resulted in some major reshuffling behind the scenes. However, most of these will only affect the programmers among the polymake users: * Data file format switched fr...
by joswig
10 Dec 2019, 11:25
Forum: Helpdesk
Topic: Progress while computing H-representation
Replies: 3
Views: 1465

Re: Progress while computing H-representation

If you have an server with multiple cores (like 20), which algorithm can make use of this? Where do i find information on this? Again, please consult that paper ;-) There are currently two parallel convex hull codes available (that I am aware of): normaliz and lrs (in its mplrs version). The polyma...
by joswig
06 Dec 2019, 11:35
Forum: Helpdesk
Topic: Progress while computing H-representation
Replies: 3
Views: 1465

Re: Progress while computing H-representation

Questions like these appeared in this forum in several guises (and have been answered, see, e.g., https://forum.polymake.org/viewtopic.php?f=8&t=1693 ). I am aware, however, that for non-experts it may not be obvious that these questions are essentially the same. So I answer them again. 1. When I ca...
by joswig
19 Nov 2019, 14:49
Forum: News
Topic: polymake 3.6 released
Replies: 0
Views: 3202

polymake 3.6 released

This is to announce the release of polymake 3.6. This time we mainly focused on new mathematical concepts and algorithms. In particular we now have: compactifications of tropical hypersurfaces; see Kastner, Shaw and Winz, arXiv:1612.09526 (implementation by the authors) tropical Voronoi diagrams; se...

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