------------------------------------------------------------------- Fri Dec 12 13:35:58 UTC 2014 - jengelh@inai.de - Update to new upstream release 2.1.1 * extensive new features for computing with elements and subsemigroups of the partition monoid. * support for ideals of transformation, partial permutation, and bipartition semigroups, and subsemigroups of Rees 0-matrix semigroups. * The new operations IsomorphismSemigroups, IsIsomorphicSemigroup, and SmallestMultiplicationTable. * The new operation MaximalSubsemigroups, which returns the maximal subsemigroups of an arbitrary semigroup. * The new operation Normalizer for computing a subgroup of a permutation group consisting of those permutations that stabilise, under conjugation, a transformation, partial perm, or bipartition semigroup. * The new operation CharacterTableOfInverseSemigroup for finding the character table of an inverse semigroup of partial permutations. * Methods for defining and manipulating the congruences of a Rees 0-matrix semigroup. * The operation EndomorphismsPartition that returns the monoid of endomorphisms preserving a partition. This monoid is defined using the minimum possible number of generators. * A lot more, see the detailed changelog in the package. ------------------------------------------------------------------- Tue Feb 4 17:44:38 UTC 2014 - jengelh@inai.de - Update to new upstream release 1.4 * Package rename from citrus to semigroup. The package has been completely overhauled, the performance has been improved, and the code has been generalized so that in the future the same code can be used to compute with other types of semigroups. * This release includes several new methods for inverse semigroups of partial permutations and for free inverse semigroup. Most notably among the new methods for inverse semigroups of partial permutations are: "SmallerDegreePartialPermRepresentation" and "VagnerPrestonRepresentation" for changing the representation of an inverse semigroup of partial permutations. * The methods in Semigroups have been extended to apply to arbitrary subsemigroups of regular Rees 0-matrix semigroups over groups; * A new method for MaximalSubsemigroups of Rees matrix semigroup has been implemented; * The function Read/WriteSemigroups have been renamed Read/WriteGenerators and their performance has been improved. It is now possible to use WriteGenerators to write to a gzipped file. ------------------------------------------------------------------- Fri May 10 13:47:02 UTC 2013 - jengelh@inai.de - Split citrus (version 0.9999) off the gap RPM package