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D.13.2.35 isNormal
Procedure from library polymake.lib (see polymake_lib).
- Usage:
- isNormal(p); p polytope
- Return:
- 1, if the projective toric variety defined by p is projectively normal; 0 otherwise
Example:
| LIB "polymake.lib";
==> Welcome to polymake version
==> Copyright (c) 1997-2015
==> Ewgenij Gawrilow, Michael Joswig (TU Darmstadt)
==> http://www.polymake.org
intmat M[6][4]=
1,1,1,2,
1,-1,-1,-2,
1,1,0,0,
1,-1,0,0,
1,0,1,0,
1,0,-1,0;
polytope p = polytopeViaPoints(M);
isNormal(p);
==> polymake: used package cdd
==> cddlib
==> Implementation of the double description method of Motzkin et al.
==> Copyright by Komei Fukuda.
==> http://www.ifor.math.ethz.ch/~fukuda/cdd_home/cdd.html
==>
==> 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/
==>
==> polymake: used package 4ti2
==> 4ti2 -- A software package for algebraic, geometric and combinatorial p\
roblems on linear spaces.
==> Copyright by 4ti2 team.
==> http://www.4ti2.de/
==>
==> 0
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