Search found 142 matches

Go to advanced search

by joswig
15 Apr 2019, 16:40
Forum: News
Topic: polymake 3.4 released
Replies: 0
Views: 18

polymake 3.4 released

Dear polymakers, we are happy to inform you that version 3.4 of polymake appeared today. We moved to more rapid development cycle, aiming at four releases per year. So stay tuned for the next release, which is scheduled for July 15 already. As usual we are happy about any feedback that you might giv...
by joswig
05 Apr 2019, 09:45
Forum: Helpdesk
Topic: Determining version
Replies: 7
Views: 98

Re: Determining version

As Ewgenij had pointed out, calling > polymake-config --version 3.3 from the terminal shell is the standard way to learn about the polymake version. The executable polymake-config is installed alongside the actual polymake. There are also many other things that you can figure out about the installat...
by joswig
26 Mar 2019, 09:35
Forum: Helpdesk
Topic: Problem with Installing Polymake
Replies: 7
Views: 144

Re: Problem with Installing Polymake

Do you know any way to install XML::LibXSLT? I am on a linux machine if that clarifies anything.
Most distributions have this as a package. What is your setup, exactly?
by joswig
22 Mar 2019, 12:02
Forum: Helpdesk
Topic: The root_system function
Replies: 8
Views: 118

Re: The root_system function

Please tell us which polymake version your are using on which operating system. Did you compile from source code (then, please, send your file build/config.ninja), or did you use some precompiled version from some package manager (which?).
by joswig
20 Mar 2019, 14:32
Forum: Helpdesk
Topic: What is the faster way I can compute the integer convex hull of an ILP formulation?
Replies: 1
Views: 50

Re: What is the faster way I can compute the integer convex hull of an ILP formulation?

This is impossible to judge without seeing the data (and the precise steps that you took). Please also recall that deciding whether or not a polyhedron, given in terms of inequalities, admits a feasible point with integer coordinates is an NP-hard problem. That said: computing integer hulls in polym...
by joswig
24 Feb 2019, 22:09
Forum: General Discussion
Topic: Enumerating all integer feasible points, CPLEX vs Polymake
Replies: 18
Views: 567

Re: Enumerating all integer feasible points, CPLEX vs Polymake

polymake has more than one algorithm to enumerate integer points. It is next to impossible to tell which one is best without studying the input in details. This is a rather complicated topic, and there is no easy answers to be expected here. This is why we wrote a lengthy survey with lots of experim...
by joswig
14 Feb 2019, 20:47
Forum: Helpdesk
Topic: Problems with tropical polytopes with rational vertices
Replies: 5
Views: 152

Re: Problems with tropical polytopes with rational vertices

Which version of polymake are you using? We just released version 3.3, and there it works. It is possible that in some older versions the types get messed up. Beware that the property POINTS takes a small object of type Matrix<TropicalNumber<Min>>. Object of type Rational should automatically conver...
by joswig
07 Feb 2019, 13:59
Forum: Helpdesk
Topic: Strugles with VERTICES_IN_FACETS
Replies: 2
Views: 138

Re: Strugles with VERTICES_IN_FACETS

My purpose is to compute a cone $c pointed at some vertex $v of a polytope $p, such that its rays are the affine hull of the facets of $p incident to $v, and such that $p itself is not contained in $c. Sorry, I do not understand what you want to compute. Do you want to compute the intersection of t...
by joswig
23 Sep 2018, 17:47
Forum: General Discussion
Topic: Math StackExchange Q&A - infinite family of self-dual polytopes
Replies: 1
Views: 6840

Re: Math StackExchange Q&A - infinite family of self-dual polytopes

Thanks for letting us now (and mentioning polymake). I like the Sierpinksi pattern!
by joswig
27 Aug 2018, 16:40
Forum: Helpdesk
Topic: Facets calculated on 2nd try (not on 1st try)
Replies: 1
Views: 7548

Re: Facets calculated on 2nd try (not on 1st try)

I looked into this, but I cannot reproduce your error. Sorry. Please install a version of polymake on your system, cf. https://polymake.org/doku.php/download/start . The shell.polymake.org version has a number of limitations and is proof-of-concept only. For instance, there is an upper limit on the ...

Go to advanced search

cron