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= Sage Days 84 : Polytopes in Sage =  = Sage Days 84 : Polytopes (in Sage, Python, polymake and more) = 
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'''''February 27th  March 12th 2017''''' '''''Probably Olot, Spain''''' 
'''''February 27th  March 10th 2017''''' '''''[[http://www.openstreetmap.org/#map=14/42.1772/2.4901Olot, Catalunya, Spain]]''''' 
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<<TableOfContents()>> These Sage days will be focused on the development of the interface to polytopes libraries (ppl, polymake, etc) as well as the creation of a generic number field implementation in C/C++. This workshop is dedicated to people already familiar to Sage or being active in some polytope related libraries/softwares. 
These (Sage) days will be focused on Polytopes and linear programming. This workshop is dedicated to people already familiar with Sage or being active in some polytope related libraries/software. 
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== Practical information == The Sage Days will happen at [[http://faberresidency.com/FABER]] in [[http://www.openstreetmap.org/#map=14/42.1772/2.4901Olot]]. It is a small town close to Girona (55km) and Barcelona (110km). You can find very detailed practical information about how to reach Faber [[http://www.warwick.ac.uk/mmasdeu/files/faber_information.pdfHERE]]. == Schedule == Flattened alternative presentation (every free slot is made of coding sprint): * Tuesday Feb 28 * 09:00 : organization meeting * 14:00 : sage sample * 17:00 : group cohomology * 21:00 : autotools * Wednesday Mar 1 * 10:00 : convex hull howto * afternoon (depending on forecast) : Barvinok * afternoon (depending on forecast) : hiking the volcanoes * Thursday Mar 2 * 10:00 : school activity * 14:00 : Pexpect * 17:00 : max plus * Friday Mar 3 * 14:00 : Sage categoris * 17:00 : constraints on polytopes * Saturday Mar 4 Math talks * group cohomology (Aurel/Marc) * Barvinok (integer points in polytopes) (Matthias) * max plus semigroup (Vincent) * combinatorial and geometrical constraints on polytopes (JP) * ? Development/softwares talks * sage sample: how to make a sage package (Matthias) * autotools, make, etc (Matthias) * Pexpect (Simon) * convex hull howto (Matthias) * Sage categories (Vincent/Simon) == Projects == You can have a look at our list of [[https://trac.sagemath.org/query?keywords=~days84Sage tickets with days84 tags]] * develop interfaces to polytope libraries/softwares (ppl, polymake, etc) * moving as independent Python packages the Sage interfaces to cdd, ppl, etc (see e.g. [[https://pypi.python.org/pypi/pplpy/pplpy]]) * make a generic number field implementation in C/C++ using normaliz * add mutable polytopes in Sage * Delaunay/Voronoi polytopes of lattices (> algorithm for norm form equation) * [[https://trac.sagemath.org/ticket/22006#22006: CBC tries to use system's blas at runtime which creates an error]] * [[https://trac.sagemath.org/ticket/20875#20875: Metaticket: Polytopes, lattice (integer) point counting / enumeration, and their applications]] * [[https://trac.sagemath.org/ticket/20302#20302: Metaticket: Improvements to MixedIntegerLinearProgram etc.]] * [[https://trac.sagemath.org/ticket/18703#18703: oriented matroids]] * release the [[https://github.com/videlec/eanticreal embedded number fields library]] (built on top of antic) * [[https://trac.sagemath.org/ticket/21950#21950: Add pulling_triangulation method to polyhedron class and point configuration]] * Uniform random generation of integer points in polytopes * Survey existent maintained Python bindings to MILP solvers, and see if we could use them instead of our own, those include pyomo, pulp, numberjack,... * [[http://doc.sagemath.org/html/en/reference/geometry/sage/geometry/hasse_diagram.htmlAtomic and Coatomic lattice]] Refactor this function so that it returns a lattice and so that you can input only one of the two incidences. * [[https://trac.sagemath.org/ticket/22420 #22420:Metaticket: Polytopes, polyhedron and their properties]] Increase the functionalities of polyhedron class * ... (add your project!) 

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* [[http://www.labri.fr/perso/vdelecro/Vincent Delecroix]] is a researcher in ergodic theory, geometry and combinatorics on words. * Marc Masdeu * JeanPhilippe Labbé * Matthias Köppe * Moritz Firsching 
* [[http://www.labri.fr/perso/vdelecro/Vincent Delecroix (LaBRI  Bordeaux)]] (February 27th  March 11th) * [[http://warwick.ac.uk/mmasdeu/Marc Masdeu (U. Warwick)]] (February 27th  March 10th) * [[http://page.mi.fuberlin.de/labbe/JeanPhilippe Labbé (Freie Universität Berlin)]] (February 27th  March 10th) * [[https://www.math.ucdavis.edu/~mkoeppe/Matthias Köppe (UC Davis)]] (February 27th  March 11th) * [[https://page.mi.fuberlin.de/moritz/Moritz Firsching (Freie Universität Berlin)]] (March 3rd  March 8th) * [[https://mat.upc.edu/en/people/julian.pfeifle/Julian Pfeifle (U. Politècnica de Catalunya)]] (March 6th  March 10th) * [[http://marceloforets.fr/Marcelo Forets (VERIMAG  U. Grenoble)]] (March 5th  March 11th) * [[http://www.normalesup.org/~page/Aurel Page (U. Warwick)]] (February 27th  March 3rd) * [[http://www.mathematik.tudarmstadt.de/~paffenholz/Andreas Paffenholz (Technische U. Darmstadt)]] (March 6th  March 11th) * Vincent Klein (Bordeaux, March 3rd  March 10th) * ThierryMonteil (CNRS, Univ. Paris North, February 27th  March 7th) * [[http://users.minet.unijena.de/~king/eindex.htmlSimon King (FSU Jena)]] (February 27th  March 11th) == Acknowledgment == This workshop is supported by the H2020 European Project [[http://opendreamkit.org/OpenDreamKit]] 
Sage Days 84 : Polytopes (in Sage, Python, polymake and more)
February 27th  March 10th 2017 Olot, Catalunya, Spain
These (Sage) days will be focused on Polytopes and linear programming. This workshop is dedicated to people already familiar with Sage or being active in some polytope related libraries/software.
There is a very limited number of places. If you are interested get quickly in contact with Vincent Delecroix (vincentDOTdelecroixATuDASHbordeaux.fr).
During the workshop participants will have to cook several times for everybody. Bring your favorite recipies!
Practical information
The Sage Days will happen at FABER in Olot. It is a small town close to Girona (55km) and Barcelona (110km). You can find very detailed practical information about how to reach Faber HERE.
Schedule
Flattened alternative presentation (every free slot is made of coding sprint):
 Tuesday Feb 28
 09:00 : organization meeting
 14:00 : sage sample
 17:00 : group cohomology
 21:00 : autotools
 Wednesday Mar 1
 10:00 : convex hull howto
 afternoon (depending on forecast) : Barvinok
 afternoon (depending on forecast) : hiking the volcanoes
 Thursday Mar 2
 10:00 : school activity
 14:00 : Pexpect
 17:00 : max plus
 Friday Mar 3
 14:00 : Sage categoris
 17:00 : constraints on polytopes
 Saturday Mar 4
Math talks
 group cohomology (Aurel/Marc)
 Barvinok (integer points in polytopes) (Matthias)
 max plus semigroup (Vincent)
 combinatorial and geometrical constraints on polytopes (JP)
 ?
Development/softwares talks
 sage sample: how to make a sage package (Matthias)
 autotools, make, etc (Matthias)
 Pexpect (Simon)
 convex hull howto (Matthias)
 Sage categories (Vincent/Simon)
Projects
You can have a look at our list of Sage tickets with days84 tags
 develop interfaces to polytope libraries/softwares (ppl, polymake, etc)
moving as independent Python packages the Sage interfaces to cdd, ppl, etc (see e.g. pplpy)
 make a generic number field implementation in C/C++ using normaliz
 add mutable polytopes in Sage
Delaunay/Voronoi polytopes of lattices (> algorithm for norm form equation)
#22006: CBC tries to use system's blas at runtime which creates an error
#20302: Metaticket: Improvements to MixedIntegerLinearProgram etc.
release the real embedded number fields library (built on top of antic)
#21950: Add pulling_triangulation method to polyhedron class and point configuration
 Uniform random generation of integer points in polytopes
 Survey existent maintained Python bindings to MILP solvers, and see if we could use them instead of our own, those include pyomo, pulp, numberjack,...
Atomic and Coatomic lattice Refactor this function so that it returns a lattice and so that you can input only one of the two incidences.
#22420:Metaticket: Polytopes, polyhedron and their properties Increase the functionalities of polyhedron class
 ... (add your project!)
Participants
Vincent Delecroix (LaBRI  Bordeaux) (February 27th  March 11th)
Marc Masdeu (U. Warwick) (February 27th  March 10th)
JeanPhilippe Labbé (Freie Universität Berlin) (February 27th  March 10th)
Matthias Köppe (UC Davis) (February 27th  March 11th)
Moritz Firsching (Freie Universität Berlin) (March 3rd  March 8th)
Julian Pfeifle (U. Politècnica de Catalunya) (March 6th  March 10th)
Marcelo Forets (VERIMAG  U. Grenoble) (March 5th  March 11th)
Aurel Page (U. Warwick) (February 27th  March 3rd)
Andreas Paffenholz (Technische U. Darmstadt) (March 6th  March 11th)
 Vincent Klein (Bordeaux, March 3rd  March 10th)
ThierryMonteil (CNRS, Univ. Paris North, February 27th  March 7th)
Simon King (FSU Jena) (February 27th  March 11th)
Acknowledgment
This workshop is supported by the H2020 European Project OpenDreamKit