*-combinat Days Project Idea Page
Implement a generic FactoredElement class
PEOPLE: Burcin Erocal
- In many combinatorics applications we work with rational functions whose numerator/denominator factor into nice components where the factorization is also known beforehand. The current representation of rational functions in Sage use the expanded form of the numerator and denominator. The goal is to implement a generic wrapper to store elements in a factored representation.
sage-devel thread about working with factored denominators
code mentined above is here
An example of adding a new basis to an algebra
PEOPLE: Franco Saliola
- This should be a nice exercise in adding a new basis (the seminormal basis) to an algebra (the group algebra of the symmetric group). We don't even have to introduce any new code to construct the basis since it already exists in Sage, thanks to Mike Hansen. On the other hand, I do have a better implementation based on a method that Alain Lascoux explained to me, so we could use that instead.
Try out Nathann Cohen new interface to Mixed Integer Linear Programming software
PEOPLE Nicolas Thiéry
Bug squashing!
PEOPLE: Franco Saliola
- There are bugs in Sage that need fixin':
The wiki page quirks and weirdness in sage-combinat contains a list of quirks and weirdness in sage-combinat.
The sage-combinat milestone lists all tickets labelled sage-combinat.
Categories
100% doctest and review for all patches up to sagecombinat 4.1
Functorial constructions: subquotient, cartesian_product
FlorentHivert, FrancoSaliola, AnneSchilling, NicolasThiéry
Categorification of RootSystems and Crystals
And application to parabolic subroot-systems
NicolasBorie, AnneSchilling, NicolasThiéry
graph layout using graphviz / dot2tex optional package
Anne Schilling, FrancoSaliola, NicolasThiéry
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