Polymake 4.4

Release dates:

– general –

– distribution –

– interfaces –

– fan –

SubdivisionOfPoints: fix bug in MIN_WEIGHTS for non-triangulations
HyperplaneArrangements: add rule for property RAYS_IN_HYPERPLANES
PolyhedralFan: Refactor code for symmetric fans
1. remove properties from PolyhedralFan that depend on GROUP
2. access any group action via GROUP.*_ACTION
3. Enhance F_VECTOR computation for PolyhedralFan with group action to consume less memory (and work with QuadraticExtension)
refactored barycentric_subdivision to speed up by depending less on perl
DisjointStackyFan: new data structure for stacky fans whose orbits are disjoint
1. properties STACKY_FACES, STACKY_F_VECTOR
2. user_functions stacky_fan(Cone), stacky_second_bsd(DisjointStackyFan)
visualization:
1. partly dropped support for labels seperated by whitespaces
2. fixed array/code/hash vertex decor handling in PolyhedralComplex→VISUAL
3. refactored SubdivisionOfPoints→VISUAL

– fulton –

– ideal –

added object specialization Ideal::Binomial for (CONE_)TORIC_IDEAL
1. added properties BINOMIAL_GENERATORS, GROEBNER.BINOMIAL_BASIS

– polytope –

minkowski_sum_fukuda refactored to use reverse search template
mixed_volume: fix bug that produces an ERROR depending on the order of input polytopes
add client for generalized_permutahedra
add the function projective_symmetry_group to compute the group of projective automorphisms of a polytope
poly2lp supports MixedIntegerLinearProgram as argument
GROEBNER_BASIS renamed to TORIC_IDEAL and migrated to a proper ideal::Ideal object
visualization:
1. refactored decor handling for unbounded polytopes
2. added decor options for SITES in VoronoiPolyhedron→VISUAL_VORONOI

– tropical –

visualization:
1. added pseudovertex decor options in Polytope→VISUAL/VISUAL_SUBDIVISION