Polymake 4.4 [polymake wiki]

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====== Polymake 4.4 ======

Release dates: 
  * 4.4: May 18th, 2021

==== Changelog ====

-- general --
  * fix various typos
  * various bugfixes

-- distribution --
  * support for clang 12 and gcc 11
  * fix build on FreeBSD (thanks Philipp Ost)

-- interfaces --
  * libnormaliz: add rules for representation conversion

-- fan --
  * SubdivisionOfPoints: fix bug in MIN_WEIGHTS for non-triangulations
  * HyperplaneArrangements: add rule for property RAYS_IN_HYPERPLANES
  * PolyhedralFan: Refactor code for symmetric fans
    - remove properties from PolyhedralFan that depend on GROUP
    - access any group action via GROUP.*_ACTION
    - 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
    - properties STACKY_FACES, STACKY_F_VECTOR
    - user_functions stacky_fan(Cone), stacky_second_bsd(DisjointStackyFan)
  * visualization:
    - partly dropped support for labels seperated by whitespaces
    - fixed array/code/hash vertex decor handling in PolyhedralComplex->VISUAL
    - refactored SubdivisionOfPoints->VISUAL

-- fulton --
  * TORIC_IDEAL renamed to CONE_TORIC_IDEAL (and moved to application polytope)

-- ideal --
  * added object specialization Ideal::Binomial for (CONE_)TORIC_IDEAL
    - 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:
    - refactored decor handling for unbounded polytopes
    - added decor options for SITES in VoronoiPolyhedron->VISUAL_VORONOI

-- tropical --
  * visualization:
    - added pseudovertex decor options in Polytope->VISUAL/VISUAL_SUBDIVISION