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| Concrete goals include (see also [[http://trac.sagemath.org/ticket/20394|Trac20394]]): | == Participants == * [[http://homepage.univie.ac.at/christian.stump|Christian Stump]], Berlin (organizer) * [[https://sites.google.com/view/tscrim/home|Travis Scrimshaw]], Queensland * [[http://webusers.imj-prg.fr/~jean.michel/gap3/|Jean Michel]], Paris * [[http://page.mi.fu-berlin.de/labbe/|Jean-Philippe Labbé]], Berlin (cancelled?) * [[http://www.ruhr-uni-bochum.de/ffm/Lehrstuehle/Lehrstuhl-VI/moeller.html|Tilman Möller]], Bochum (cancelled) * [[http://www-users.math.umn.edu/~douvr001/|Theodosios Douvropoulos]], Paris * [[https://page.mi.fu-berlin.de/moritz/|Moritz Firsching]], Berlin (Wed - Fri) == Topics == Concrete goals include (and are tracked at [[http://trac.sagemath.org/ticket/20394|Trac20394]]): |
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| == Day 1 == * Travis and Christian * [[https://trac.sagemath.org/ticket/20484|20484]] * Theo * fix bug in regular elements / improve implementation * work on {{{reduced_words}}} == Participants == * [[http://homepage.univie.ac.at/christian.stump|Christian Stump]], Berlin (organizer) * [[https://sites.google.com/view/tscrim/home|Travis Scrimshaw]], Queensland * [[http://webusers.imj-prg.fr/~jean.michel/gap3/|Jean Michel]], Paris * [[http://page.mi.fu-berlin.de/labbe/|Jean-Philippe Labbé]], Berlin * [[http://www.ruhr-uni-bochum.de/ffm/Lehrstuehle/Lehrstuhl-VI/moeller.html|Tilman Möller]], Bochum (cancelled) * [[http://www-users.math.umn.edu/~douvr001/|Theodosios Douvropoulos]], Paris * [[https://page.mi.fu-berlin.de/moritz/|Moritz Firsching]], Berlin (Wed - Fri) * to be continued... |
Sage Days 93.51, May 28 - June 1, 2018, Berlin
Sage coding sprint on reflection groups and the GAP3 chevie interface
Aim
This is the follow-up coding sprint of SageDays 80. The aim of this 5-days coding sprint is to continue the Sage work on finite reflection groups in Sage, based on the GAP3 package chevie. The topics (and the related trac tickets) can be found at http://trac.sagemath.org/ticket/20394.
Participants
Christian Stump, Berlin (organizer)
Travis Scrimshaw, Queensland
Jean Michel, Paris
Jean-Philippe Labbé, Berlin (cancelled?)
Tilman Möller, Bochum (cancelled)
Theodosios Douvropoulos, Paris
Moritz Firsching, Berlin (Wed - Fri)
Topics
Concrete goals include (and are tracked at Trac20394):
- Copy parts of the hard-coded data from chevie to Sage (Jean + Christian)
- Implement the module of derivations of a hyperplane arrangement and give its generators in the case of reflection arrangements (Tilman)
- Improve the implementations for permutahedra and associahedra (JP)
- Implement reduced words in crg's
- Get the iteration algorithm for Coxeter groups using coset decomposition working
cythonize critical components such as has_descent
Discuss what else we can learn from the chevie implementation
have a look at https://trac.sagemath.org/ticket/13426
have a look at the function .reduced_words
Funding
The workshop is funded by the German Research Foundation grants STU 563/2 Coxeter-Catalan combinatorics and STU 563/4-1 Noncrossing phenomena in Algebra and Geometry.