This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ====== Polymake 3.1 ====== Release date March 28th, 2017 ==== Changelog ==== -- distribution -- * polymake now requires C++ 14 to compile, in particular we need gcc >= 5 or clang >= 3.4 and perl >= 5.16. * support for perl 5.24. * fix endianness issue and update struct magic_state (thanks Jerry James) * support for gcc 6 and clang up to 4.0. * workaround for compile error under clang 3.8 / xcode 7.3. * fix incompatibility of the Integer type with libnormaliz on 32bit platforms. * fix several other minor compilation issues. * ship test-driver to allow example-code to be tested in the distribution * boost is now required for the polymake core (for permlib) * perl module Term-ReadKey is now a requirement -- interfaces -- * include beta jupyter-polymake kernel (thanks: Sebastian Gutsche) * include nauty interface in minimal tarball. * warn when neither bliss nor nauty are enabled. * polydb interface is now in the polymake core * updated bundled permlib to 0.2.9 * improved interfaces for permlib and sympol: * both have (experimental) support for using non-bundled installations * permlib is now a core requirement * bundled:group disbanded into bundled:sympol / core functionality * bundled permlib headers are now installed with polymake unless external permlib is used * improved handling of matrices with zero cols xor zero rows in convex hull interfaces * improved singular configuration to support pkg-config (e.g. on Ubuntu) -- general -- * polymake can now generate xml schemes and validate the data files against those * completely refactored Polynomial related data types: * rings are now uniquely identified by coefficient type, exponent type and number of variables * variable names are only used for pretty printing and parsing (and can be customized) * improved parser for polynomials * types Monomial, Term and Ring are gone * improved visualization with graphviz and ThreeJS. * new and improved visualization client svg. * basic support for output of 3-polytopes in STL file format (common in 3d printing). * new mechanism for "twin" properties (such as Matroid.DUAL). * many more example code fragments, in particular for construction of big object types. * improvements for map and set types: - only accept ordered types as keys / elements * various bugfixes and code optimizations. * fixes for find_permutation with unordered types * fixes for the TikZ visualization: * for drawing PointConfigurations. * for drawing lattice points in polytopes. * for drawing subobjects * fixes in singular value decomposition -- fan -- * new big object types SubdivisionOfPoints and SubdivisionOfVectors. * new subobject SubdivisionOfPoints.TIGHT_SPAN with method VISUAL_METRIC_TIGHT_SPAN for metric tight spans. * new functions metric_extended_tight_span and metric_tight_span * new client to compute the k-skeleton of a fan * secondary_cone is now a method of SubdivisionOfVectors. * improved heuristics for planar nets of 3-polytopes. * improved visualization for fans * fix in regularity client (thanks: Sebastian Gutsche). * another fix in regularity client. * fixed issues with empty matrices -- graph -- * completely rewritten and modularized Hasse diagram data types and functions * new client all_spanningtrees, which finds all spanning trees in a connected graph. * new properties for bi-,weak and strong connectedness of a (directed) graph. * new property EIGENVALUES_LAPLACIAN, containing the eigenvalues of the discrete Laplacian of a graph. * new client for graph homomorphisms * fixes in hungarian method and tropical::tdet -- group -- * major refactoring of symmetries on objects: * new big object types Action, PermutationAction, PermutationActionOnSets, ImplicitActionOnSet, MatrixGroupActionOnVector. * objects with symmetries now contain multiple subobjects of type Group, which in turn can contain different kinds of Actions as properties. * boost_dynamic_bitset replaced with polymake Bitset -- ideal -- * new client pluecker_ideal, computing the Plücker ideal of the Grassmannian. * new property INITIAL_FORMS in Ideal. -- matroid -- * refactoring of dual matroids: * each matroid has a twin property DUAL, which is a matroid again. * there are various rules, which compute properties in a matroid from its dual. * new big object type ValuatedMatroid. * added many new properties to Matroid: AUTOMORPHISM_GROUP, CATENARY_G_INVARIANT, G_INVARIANT, IDENTICALLY_SELF_DUAL, LAMINAR, LATTICE_OF_CYCLIC_FLATS, N_CONNECTED_COMPONENTS, N_CYCLIC_FLATS, N_FLATS, NESTED, SELF_DUAL, SIMPLE, SPLIT, SPLIT_FLACETS, SPARSE_PAVING, TRANSVERSAL, UNIFORM. * various clients for matroid operations: various lifts and extensions, truncation, union, intersection. * replaced client "oxley_matroids" by client "special_matroids", where matroids can be selected by name. * matroids can now be defined via their flats or cyclic flats. -- polytope -- * updated bundled extension libnormaliz to version 3.1.3. * new properties in Polytope for excess vertex and facet degree. * new client face to create Polytope from a face of a polytope * new visualization for cones * revived OrbitPolytope type as object specialization PointOrbit * improved handling of matrices with zero cols xor zero rows * improved initial rules for polytopes and cones * improved computation of separating hyperplanes, which allows for weak separation as well. * improved computation of whether a point lies in (the interior of) a polytope. In particular, this works now for generic polytopes, not just over the rationals. * removed Object TightSpan. Functionality is now in fan: * moved functions min_metric, max_metric, thrackle_metric into application fan. * splitstree is moved to fan as a userfunction * fix for degenerate hypersimplices (thanks: Charles Wang). * fixes for solving LPs with lineality * fixes in TOPCOM interface. * fixed loading of old data files with OrbitPolytope and SymmetricPolytope -- topaz -- * homology can be computed for arbitrary chaincomplexes, represented by their boundary matrices. * new clients for computing Vietoris-Rips complexes and filtrations. * new client for computing persistent homology, both over arbitrary fields and the integers. * new function to compute boundary matrices of simplicial complexes * new function to compute betti numbers of chaincomplexes and simplicial complexes * added property VERTEX_MAP for subcomplexes (e.g. BOUNDARY) * various fixes and improvements regarding subcomplexes -- tropical -- * renamed tropical::Cone to tropical::Polytope. * new clients for tropical distance, perimeter, Cramer's rule and variants of the determinant. * new clients for computing the star of a cycle in bundled extension atint. * new big object type MatroidRingCycle in bundled extension atint, which represents linear combinations of matroid fans. * new client for computing tropical linear spaces of arbitrary valuated matroids. * refactoring of function linear_space news/release_3_1.txt Last modified: 2017/03/28 10:08by benmuell