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D.13.4.37 latticeCodegree
Procedure from library polymake.lib (see polymake_lib).
- Usage:
- latticeCodegree(p); p polytope
- Return:
- int, the smallest number n such that n*p has a relative interior lattice point
- Note:
- dimension(p)+1==latticeDegree(p)+latticeCodegree(p)
Example:
| LIB "polymake.lib";
==> Welcome to polymake version
==> Copyright (c) 1997-2015
==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt)
==> http://www.polymake.org
intmat M[4][3]=
1,1,0,
1,1,1,
1,0,1,
1,0,0;
polytope p = polytopeViaPoints(M);
latticeCodegree(p);
==> polymake: used package ppl
==> The Parma Polyhedra Library (PPL): A C++ library for convex polyhedra
==> and other numerical abstractions.
==> http://www.cs.unipr.it/ppl/
==>
==> 2
intmat N[4][4]=
1,1,0,0,
1,0,1,0,
1,0,0,1,
1,0,0,0;
polytope q = polytopeViaPoints(N);
latticeCodegree(q);
==> 4
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