v1.5.3

Announcements

Note: this release is fully compatible with Julia v0.7/1.0 and also with Julia v0.6.

Features

• added parallel module with box approximation implementation (#905)
• added UnionSet type (#922)
• added numeric conversion of HalfSpace (#985)
• added binary convex hull (polygons, v-polytopes) (#953)

Bug fixes

• accept arbitrary vectors in σ for HPolyhedron/HPolytope (#1013)

Enhancements

• allow abstract vector in Singleton (#970)
• make low/high methods of Interval faster (#971)
• added copy method to the LazySet interface (#1002)
• added comparisons in floating point with approximately-zero checks (#929)
• added faster box approximation of a Zonotope (#1019)
• faster conversion from Zonotope to HPolytope (#958)

v1.5.2

Note: this release is fully compatible with Julia v0.7/1.0 and also with Julia v0.6.

Features

• added constrained_dimensions method for HPolyhedron (#933)
• binary concrete convex_hull now removes redundant vertices (#944)
• added ρ for unbounded Hyperplane and HalfSpace (#940)
• added isbounded methods for all set types (#956)

Bug fixes

• fixed issubset and box approximation methods for EmptySet (#931)

Minor changes

• added lazy decompose method using LinearMap (#935)
• added dimensionality assertions in convex_hull (#945)
• remove redundant vertices by default in higher-dimensional convex hull with Polyhedra (#944)
• update plotting recipes for polytopes (#937)
• low/high for Interval is now consistent with corresponding methods for other AbstractHyperrectangle set types; use min/max for the old behavior (#959)

v1.5.1

Note: this release is fully compatible with Julia v0.7/1.0 and also with Julia v0.6.

Features

• added concrete intersection of Intervals (#890)
• added rand for creating random sets (#870)

Bug fixes

• fixed radius hyperrectangle of interval (#866)
• fixed one and two vertex corner cases of convex hull (#889)
• fixed concrete intersection of HPpolygons (#884)
• fixed usage of isdefined when importing from different modules (#910)
• fixed vertices_list of polygon with infeasible constraints (#919)

Minor changes

• constraints of new HPolygons are now sorted by default (#896)

v1.5.0

Announcements

This is the last release that supports Julia v0.6.

Features

• added tohrep/tovrep for HPolytope/VPolytope (also fixes σ for VPolytope) (#603)
• added == comparison between set types (#604)
• added conversion from an AbstractHyperrectangle to a polygon or a polytope in constraint representation (#615)
• added low and high methods for all AbstractHyperrectangle types (#618)
• added emptiness check for HPolytopes/VPolytopes and their intersection (#624)
• added a function to control the backend for Polyhedra.jl-related operations (default for Rational numeric types: :exact) (#625)
• added concrete intersection for HPolytope and VPolytope (#633), for polytopic sets (relying on Polyhedra.jl) (#646), for HPolygons (#651), for HalfSpace and HPolytope (#765), and for HPolyhedron and AbstractPolytope (#774)
• added empty intersection check for a compact set with Hyperplane (#650), a HalfSpace (#659), and an HPolytope (#713), and for two HalfSpaces (#782)
• added many convert methods for polytopes (#636)
• added vertices_list for CartesianProduct(Array), LinearMap, and ExponentialMap (#670)
• added lazy intersection (support function only) for a compact set with a HalfSpace and Hyperplane (#677, #685, #694)
• added overapproximate for lazy intersection (support function only) of a polytope with a compact set (#688) and a HalfSpace (#784)
• added support function for most lazy operations (#716, #717, #719)
• added conservative emptiness check option for Intersection (#723)
• added constraints_list methods for VPolygon/VPolytope (#726), LineSegment (#728), Zonotope (#732), Ball1 (#735), HalfSpace (#763), and CartesianProduct(Array) (#761)
• added isempty method for EmptySet (#741)
• added constrained_dimensions method for unbounded sets (#760)
• added HPolyhedron set type (#767)
• added swap method for Intersection (#819)
• added isempty methods for most set types (#859)

Bug fixes

• renamed intersect to intersection for HPolytope/VPolytope (to be consistent with other concrete intersections) (#596)
• fixed support for Julia v1.0 (#668)
• fixed vertices_list for Zonotopes in non-2D dimensions (#673)
• fixed support vector for HalfSpace (#748)
• fixed binary method ambiguities (#857, #860)

Minor changes

• renamed interfaces AbstractPointSymmetric and -Polytope to AbstractCentrallySymmetric and -Polytope (#588)
• Improved norm for hyperrectangular sets (#592)
• Faster vertices_list implementation for centrally symmetric polytopes with radius 0 (#590)
• revised plotting of polytopic set types (enabled plotting of 2D VPolytopes without loading Polyhedra.jl; always plot the exact polytope by default (instead of a box approximation)) (#602)
• removed dependencies Plots.jl and GR.jl (#648)
• added aliases CompactSet and NonCompactSet (#649)
• added alias isdisjoint for is_intersection_empty (#655)
• linear_map tries to preserve the input type for polytopes (#636)
• made Interval an AbstractHyperrectangle (#687)
• added boundedness check for support vector of polytope (#711)
• added constraints_list to AbstractPolytope interface (#734)
• support vector for empty HPolytope now raises an error message (#752)
• added a cache to Intersection; now emptiness is determined only once (#796)
• generalized default is_intersection_empty method (#850)
• avoid array insertion in iterative refinement (#863)

v1.4.0

Announcements

• We added support for the new Julia version (v0.7/v1). The previous Julia version (v0.6) is still supported.

Features

• added binary search option to addconstraint! and σ of HPolygon/HPolygonOpt (#379)

Bug fixes

• fixed membership check of ExponentialMap (#485)
• fixed inconsistent index caching of HPolygonOpt (#553)
• fixed error tolerance for Rational types in iterative refinement (#567)

Minor changes

• renamed is_subset to ⊆ (#457)
• made LineSegment a subtype of AbstractPointSymmetricPolytope (#448)
• made VPolytope's constructor from a VPolygon copy the vertices (instead of sharing) (#464)
• reordered and added type parameters of LinearMap (#472)
• unified signature of σ, particularly by requiring the same numeric type for direction and set (#478)

v1.3.0

Features

• added benchmarking capabilities (#356)
• added an_element function for LinearMap (#374)
• added concrete linear_map functions for polytopes and singletons (#373)
• added lazy IntersectionArray type (#390)
• added functions to convert into HPolygon from VPolygon, AbstractSingleton, and LineSegment (#376)
• added concrete intersection of two hyperrectangles (#399)

Bug fixes

• fixed performance regression in LinearMap (#205)
• fixed caching issue in CacheMinkowskiSum (#367)
• fixed crash when printin error message in VPolygon (#393)
• fixed change of numeric type in LinearMap of ZeroSet (#413)
• fixed vertices_list of HPolytope (#425)
• fixed intersect to fall back to Intersection only for LazySet types (#429)
• fixed SymmetricIntervalHull's radius_hyperrectangle function (#421)

Minor changes

• fixed Julia v0.7 deprecation warnings (#358, #403, #404)
• fixed inconsistency in VPolygon (renamed vertices_list field to vertices) (#385)
• replaced explicit error checks for function inputs by @assert (#392)
• added fixed version numbers for package in REQUIRE (#418)
• changed numeric type of Ellipsoid to AbstractFloat (#434)
• changed return type of intersection of two Lines to a Singleton (#408)

v1.2.2

Features

• added an interface to define template directions (#330, #334, #352)
• added a caching lazy Minkowski sum type (#349, #354)

Bug fixes

• fixed constructor for rational Interval (#325)
• fixed conversion from HPolytope to HPolygon (#341)
• add Compat to the REQUIRE file, LazySets now precompiles in v0.7 (#353) (but tests fail)

Minor changes

• made overapproximate with the same type for any LazySet a no-op (#328)
• updated the installation note, since LazySets is now registered in METADATA, the repository of registered Julia packages (#327)
• fixed deprecations for concrete polyhedra doctests (#329)

v1.2.1

Bug fixes

• fixed vector-set multiplication (#321)

v1.2.0

Features

• added intersection check for Zonotope and Hyperplane (#208)
• added order reduction for Zonotopes (#211)
• added default an_element function implementation (#216)
• added VPolytope (#217)
• added array getter for n-ary operations (#226)
• added conversion between some set types (#225, #227)
• added PolynomialZonotope (#184), then moved to PolynomialZonotopes.jl
• added a convex hull of zonotopes overapproximate method into a zonotope (#229)
• added LineSegment (#231)
• generalized decomposition into arbitrary block structures (#259, #282)
• added Interval (#277, #316)

Bug fixes

• fixed scalar multiplication of LinearMap (#204)
• fixed sparse direction in support vector computation of ExponentialMap (#207)
• fixed plotting of a vector of Zonotopes (2e779b9)
• fixed membership test for Zonotopes (#247)
• fixed singleton_list function (#252)
• fixed containment of CartesianProductArray (#252)
• fixed assertion error in iterative refinement (#260)
• fixed plot recipes for polytopes (#276)
• fixed slowdowns with support vector functions (#291, #294)
• fixed creation of empty HPolygons/HPolytopes (#320)

Minor changes

• Line became a LazySet type (#233)
• better error message for support vector of empty HPolytope (#252)
• more consistent array set types (#236, #268)
• overapproximate(S) now returns an n-dimensional Hyperrectangle (#271, #289)
• changed output type of ExponentialMap's get_rows/get_columns to dense matrices (#304)
• revised SparseMatrixExp (#307, #309, #312, #313)

v1.1.0

Features

• added is_intersection_empty for two Ball2s
• added (high-dimensional) HPolytope type
• added (partial) lazy Intersection type
• added lazy SymmetricIntervalHull type
• added Ellipsoid type
• added Hyperplane and HalfSpace types
• added ConvexHullArray type
• added concrete operations on zonotopes
• added external Polyhedra library
• improved support for numeric types such as Rational

Bug fixes

• fixed 2D Hyperrectangle decomposition
• fixed inverted behavior of is_intersection_empty
• fixed some plot recipes for numeric types
• fixed partial y-axis labels in documentation plots
• fixed support vector for Ball1
• fixed method ambiguities for is_subset and is_intersection_empty

Minor changes

• added an assertion to check congruence to the LinearMap constructor
• added required numeric type to LazySet and all subtypes