Differences between revisions 1 and 58 (spanning 57 versions)

Sage-Combinat Days in Cernay, 6-12 April 2014

Contents

Sage-Combinat Days in Cernay, 6-12 April 2014

Sage Days 57, Cernay 2014

The fourth "Sage-Combinat Days in Cernay" will be held at Cernay-la-Ville (40km South-West of Paris, near Orsay), April 6-12, 2014.

We booked the guest house The Tower (and Le grenier royal), a very nice and cosy "gîte", just short of an hour from Paris by public transport.

This follows a tradition of *-combinat workshops: 2012, 2010, 2009, 2007... See the links for activity reports and some photos.

This workshop is also "Sage Days 57". More Sage workshops are listed on the Workshops page of the Sage wiki.

The workshop is funded by ANR projects DynA3S, GeoDyM, PSyCo, with material help from the Mathematics and the Computer Science Departments at Université Paris-Sud, Orsay.

Participants

Tomer Bauer (Bar-Ilan U, Ramat Gan, Israel), 6--12 April
Adrien Boussicault (LaBRI, Bordeaux, France)
Volker Braun (Oxford U, UK) 6--12 April
Nicolas Borie (U Paris-Est Marne-la-Vallée, France)
Luca De Feo (U Versailles Saint-Quentin, France)
Vincent Delecroix (Labri, Bordeaux, France) 5--12 April
Matthieu Dien (UPMC, U Paris 6, Paris, France) 6--12 April
Charles Fougeron (IMJ, U Paris 7, Paris, France)
Eric Gourgoulhon (Luth, Observatoire de Paris, France)
Florent Hivert (LRI, U Paris-Sud Orsay, France)
Jean-Philippe Labbé (Freie U Berlin, Germany)
Sébastien Labbé (LIAFA, Paris, France)
Patxi Laborde Zubieta (LaBRI, Bordeaux, France) 5 - 12 April
Samuel Lelièvre (LMO, U Paris-Sud, Orsay, France), 5--12 April
Thierry Monteil (Lirmm, Montpellier, France)
Vivien Ripoll (U Vienna, Austria)
Nicolas M. Thiéry (LRI, U Paris-Sud, Orsay, France)
Jean-Pierre Flori (ANSSI, Paris, France), 7 and (probably 9) April

Programme and topics

On Monday there will be an introduction to git for those interested.

The rest of the programme is decided together during the workshop.

If you have wishes or coding projects, please edit the list of topics.

Status report

Sébastien
- ticket #6637: cleaning TransitiveIdeal and TransitiveIdealGraded
- Creation of RecursivelyEnumeratedSet
- Read my status report here
Jean Philippe
- ticket #15703
- A nice 3D self-rotating picture representing limit set of a generic orbit under the action of a Coxeter group on the projective space.
- upgraded his ubuntu and can now use Linux back again.
Vivien
- #16120 : add float to run
- Found some bugs in the cyclotomic field and discovered that a ticket is waiting for 4 years.
Charles
- Ticket #16102
- translation surfaces : merging his code with Vincent existing code.
Tomer
- #15595
- #16092
- #16090
- Subgroup zeta functions, found some bugs in symbolic
Volker
- Backend for polyhedra (especially double description algorithm) on AA
Luca Thierry Vincent
- An index for Sage pedagogical ressources.
Thierry
- rewiewed
Mathieu
- #15673
- #16107
- Lazy power series.
Patxi
- tableaux, pbs with mutability
Nicolas B
- review of the set factory
- parallelization at low-level using multithreading
Florent
- Parallelism in sage (with Nicolas B.)
Nicolas T
- lot of discussions
- fixed long standing performance issue with categories which was one of the blocker for #10963
- work on #16058: reorganisation of the index of sage.combinat in the reference manual
Adrien
- Implemented parallelogram polyomino.

Older informations

Dates

The core of the activity will be Monday, April 7, 2014 to Friday, April 11, 2014.

Arrival on Sunday, April 6, is encouraged; early arrival is possible on Saturday, April 5, 2014.

Participants are welcome to stay until Saturday, April 12.

If you wish to stay longer before or after these dates, let us know.

Venue

The workshop takes place in a guest house, which has comfortable working spaces, a cooking and dining area, and a few bedrooms. This favors an intense workshop, with everything taking place in the same location.

We will set up a wired internet connection and an open wifi.

The Tower can accommodate 8-10 people and the adjacent guest house we rented offers room for 6 more people.

The surrounding area offers nice hiking possibilities, bring hiking/climbing shoes.

Your music instruments and scores, card or board games, etc, are also welcome for the breaks.

Meal organisation

Meals are cooked in turns by the participants for everyone, so bring along your favorite recipes and dishes! All diets, including vegetarian, will be taken into account.

Funding

The workshop is funded by ANR projects DynA3S, GeoDyM, PSyCo, with material help from the Mathematics and the Computer Science Departments at Université Paris-Sud, Orsay.

Accommodation and meals for all participants are covered by our funding sources.

We can also cover travel expenses for most participants, especially PhD students and postdocs.

From Paris to Cernay

From Gare Montparnasse: 35 minutes train to Rambouillet + 15 minutes bus to Cernay-la-Ville
From Denfert-Rochereau: 40 minutes RER B to Saint-Rémy-les-Chevreuse + 15 minutes bus to Cernay-la-Ville
Map and aerial photo
Bus option
- from St Remy (RER station), bus 39-03 or 39-103
- from Rambouillet (SNCF station) line 39-03 and 39-203
- More information on schedules here. Of the two bus stops in Cernay, Grand'Place is closest to the guest house. Beware that there are big gaps in the day with no buses to Cernay.
Check travel itineraries on ViaNavigo (includes trains, RER, buses).
- Or ratp but only for travel up to Saint-Rémy-les-Chevreuse.
We will run some car shuttles from Saint-Rémy-les-Chevreuse : car shuttles organisation

Registration

To register, send an email with subject "Cernay 2014" to [email protected], where (aaa,bbb,ccc,ddd) = (sage-cernay,math,u-psud,fr), filling in all the fields you can from the following form.

    Fourth Sage-Combinat Days in Cernay

    Name:
    Position:
    Institution:
    Your webpage:

    Date of arrival:
    Date of departure:

    Travel funding request: (indicate approximate amount)

Please add a few words about your project(s) for the workshop.

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-{{{#!rst
Sage-Combinat days in Cernay
============================
+= Sage-Combinat Days in Cernay, 6-12 April 2014 =
-Line 5:
+Line 3:
-The fourth "Sage-Combinat days in Cernay" will be held at Cernay-la-Ville,
(40km south-west of Paris, near Orsay), April 6-12, 2014.
+<<TableOfContents()>>
-Line 8:
+Line 5:
-Following the \*-Combinat tradition we reserved the guest house `The
Tower <http://www.cernayvacances.com/CEngels.html>`_ at
Cernay-la-Ville.  It is very nice and cosy, 35 min train + 15
min bus from downtown Paris.
+== Sage Days 57, Cernay 2014 ==
-Line 13:
+Line 7:
-Tentative list of themes
========================
+The fourth "Sage-Combinat Days in Cernay" will be held at Cernay-la-Ville
(40km South-West of Paris, near Orsay), April 6-12, 2014.
-Line 16:
+Line 10:
-Participants, please edit!
+We booked the guest house
[[http://www.cernayvacances.com/en/stay/de-toren/|The Tower]] (and
[[http://www.cernayvacances.com/en/stay/le-grenier-royal/|Le grenier royal]]),
a very nice and cosy "gîte", just short of an hour from Paris by public transport.

This follows a tradition of *-combinat workshops: 
[[combinat/SageCombinatDaysCernay2012|2012]],
[[combinat/SageCombinatChevieWorkshopOrsay2010|2010]],
[[combinat/SageCombinatWorkshopOrsay|2009]], 
[[http://mupad-combinat.sourceforge.net/Wiki/SecondDevelopersMeeting|2007]]...
See the links for activity reports and some photos.

This workshop is also "Sage Days 57".
More Sage workshops are listed on the [[Workshops]] page of the Sage wiki.

The workshop is funded by ANR projects DynA3S, GeoDyM, PSyCo, with material help from the Mathematics and the Computer Science Departments at Université Paris-Sud, Orsay.

== Participants ==

 1. Tomer Bauer (Bar-Ilan U, Ramat Gan, Israel), 6--12 April
 2. Adrien Boussicault (LaBRI, Bordeaux, France)
 3. Volker Braun (Oxford U, UK)  6--12 April
 4. Nicolas Borie (U Paris-Est Marne-la-Vallée, France)
 5. Luca De Feo (U Versailles Saint-Quentin, France)
 6. Vincent Delecroix (Labri, Bordeaux, France) 5--12 April
 7. Matthieu Dien (UPMC, U Paris 6, Paris, France) 6--12 April
 8. Charles Fougeron (IMJ, U Paris 7, Paris, France)
 9. Eric Gourgoulhon (Luth, Observatoire de Paris, France)
 10. Florent Hivert (LRI, U Paris-Sud Orsay, France)
 11. Jean-Philippe Labbé (Freie U Berlin, Germany)
 12. Sébastien Labbé (LIAFA, Paris, France)
 13. Patxi Laborde Zubieta (LaBRI, Bordeaux, France) 5 - 12 April
 14. Samuel Lelièvre (LMO, U Paris-Sud, Orsay, France), 5--12 April
 15. Thierry Monteil (Lirmm, Montpellier, France)
 16. Vivien Ripoll (U Vienna, Austria)
 17. Nicolas M. Thiéry (LRI, U Paris-Sud, Orsay, France)
 18. Jean-Pierre Flori (ANSSI, Paris, France), 7 and (probably 9) April

== Programme and topics ==

On Monday there will be an introduction to git for those interested.

The rest of the programme is decided together during the workshop.

If you have wishes or coding projects, please edit the [[days57-topics|list of topics]].

== Status report ==

 * Sébastien
   * ticket [[http://trac.sagemath.org/ticket/6637|#6637]]: cleaning !TransitiveIdeal and !TransitiveIdealGraded
   * Creation of !RecursivelyEnumeratedSet
   * Read my [[http://www.liafa.univ-paris-diderot.fr/~labbe/blogue/2014/04/my-status-report-at-sage-days-57-recursivelyenumeratedset/|status report here]]

 * Jean Philippe
   * ticket #15703
   * A nice 3D self-rotating picture representing limit set of a generic orbit under the action of a Coxeter group on the projective space.
   * upgraded his ubuntu and can now use Linux back again.

 * Vivien
   * #16120 : add float to run
   * Found some bugs in the cyclotomic field and discovered that a ticket is waiting for 4 years.

 * Charles
   * Ticket #16102
   * translation surfaces : merging his code with Vincent existing code.

 * Tomer
   * #15595
   * #16092
   * #16090
   * Subgroup zeta functions, found some bugs in symbolic 

 * Volker
   * Backend for polyhedra (especially double description algorithm) on AA

 * Luca Thierry Vincent
   * An index for Sage pedagogical ressources.

 * Thierry
   * rewiewed 

 * Mathieu
   * #15673
   * #16107
   * Lazy power series.

 * Patxi
   * tableaux, pbs with mutability

 * Nicolas B
  * review of the set factory
  * parallelization at low-level using multithreading

 * Florent
  * Parallelism in sage  (with Nicolas B.)

 * Nicolas T
  * lot of discussions
  * fixed long standing performance issue with categories which was one of the blocker for #10963
  * work on #16058: reorganisation of the index of sage.combinat in the reference manual

 * Adrien
  * Implemented parallelogram polyomino.
 

== Older informations ==

=== Dates ===

The core of the activity will be Monday, April 7, 2014 to Friday, April 11, 2014.

Arrival on Sunday, April 6, is encouraged; early arrival is possible on Saturday, April 5, 2014.

Participants are welcome to stay until Saturday, April 12.

If you wish to stay longer before or after these dates, let us know.

=== Venue ===

The workshop takes place in a guest house, which has comfortable working spaces,
a cooking and dining area, and a few bedrooms. This favors an intense workshop,
with everything taking place in the same location.

We will set up a wired internet connection and an open wifi.

The Tower can accommodate 8-10 people and the adjacent guest house
we rented offers room for 6 more people.

The surrounding area offers nice hiking possibilities, bring hiking/climbing shoes.

Your music instruments and scores, card or board games, etc, are also welcome for the breaks.

== Meal organisation ==

Meals are cooked in turns by the participants for everyone, so bring along your
favorite recipes and dishes! All diets, including vegetarian, will be taken into
account.
-Line 19:
+Line 149:
-Tentative list of participants
==============================
+=== Funding ===
-Line 22:
+Line 151:
-Participants, please add your name!
+The workshop is funded by ANR projects DynA3S, GeoDyM, PSyCo, with material help from the Mathematics and the Computer Science Departments at Université Paris-Sud, Orsay.
-Line 24:
+Line 153:
+Accommodation and meals for all participants are covered by our funding sources.
-Line 25:
+Line 155:
-Practical information
=====================
+We can also cover travel expenses for most participants, especially PhD students and postdocs.
-Line 28:
+Line 157:
-Accommodation will be covered by our funding sources.
Travel for PhD students and PostDocs can also be funded.
Other participants, please arrange funding for your travel.
+=== From Paris to Cernay ===
-Line 32:
+Line 159:
-The Tower can accommodate 8-10 people, and if needed there is another
adjacent guest house. Participants can stay from the afternoon of
Saturday, April 5, 2014 to the morning of Saturday, April 12, 2014.
+ * From Gare Montparnasse: 35 minutes train to Rambouillet + 15 minutes bus to Cernay-la-Ville
 * From Denfert-Rochereau: 40 minutes RER B to Saint-Rémy-les-Chevreuse + 15 minutes bus to Cernay-la-Ville
 * [[http://maps.google.fr/maps?f=q&source=s_q&hl=fr&geocode=&q=Cernay+la+ville&sll=47.15984,2.988281&sspn=17.161007,44.516602&ie=UTF8&ll=48.675731,1.971735&spn=0.004066,0.010868&z=17|Map and aerial photo]]
-Line 36:
+Line 163:
-Meals are cooked in turns by the participants for everyone, so bring
along your favorite recipes and dishes!  Also bring along hiking/climbing
shoes and music instruments/scores for the breaks. There will of course
be an open wifi and wired internet connection.
+ * Bus option
    * from St Remy (RER station), bus 39-03 or 39-103
    * from Rambouillet (SNCF station) line 39-03 and 39-203
   More information on schedules [[http://www.savac.fr/transports/lignes-regulieres/votre-ligne-reguliere|here]].
   Of the two bus stops in Cernay, Grand'Place is closest to the guest house.
   Beware that there are big gaps in the day with no buses to Cernay.
-Line 41:
+Line 170:
-To register, fill in the following form, and send it by e-mail to
`Adrien Boussicault <http://www.labri.fr/perso/boussica/index_en.html>`_::
+ * Check travel itineraries on [[http://www.vianavigo.com/|ViaNavigo]] (includes trains, RER, buses).
   Or [[http://ratp.fr|ratp]] but only for travel up to Saint-Rémy-les-Chevreuse.

 * We will run some car shuttles from Saint-Rémy-les-Chevreuse : [[days57-car_shuttles|car shuttles organisation]]

=== Registration ===

To register, send an email with subject "Cernay 2014" to `[email protected]`,
where `(aaa,bbb,ccc,ddd) = (sage-cernay,math,u-psud,fr)`, filling in all
the fields you can from the following form.

{{{
    Fourth Sage-Combinat Days in Cernay
-Line 45:
+Line 185:
-    will participate to the "Fourth Sage-Combinat Days in Cernay".
+    Position:
    Institution:
    Your webpage:
-Line 49:
+Line 192:
-Coming from downtown Paris to Cernay
====================================
+    Travel funding request: (indicate approximate amount)
}}}
-Line 52:
+Line 195:
-* From Gare Montparnasse: 35 minutes train to Rambouillet + 15 minutes bus to Cernay-la-Ville
* From Châtelet-les-Halles: 45 minutes RER B to Saint-Rémy-les-Chevreuse + 15 minutes bus to Cernay-la-Ville

   There are two bus stops at Cernay. The closest to the guest house is Grand'Place.

   BEWARE: there are no buses to Cernay between 7:25am and 12:54am!

* `Map and and aerial photo <http://maps.google.fr/maps?f=q&source=s_q&hl=fr&geocode=&q=Cernay+la+ville&sll=47.15984,2.988281&sspn=17.161007,44.516602&ie=UTF8&ll=48.675731,1.971735&spn=0.004066,0.010868&z=17>`_

We will do some car shuttles from Saint-Rémy-les-Chevreuse. Please contact us in
advance to arrange that.

}}}
+Please add a few words about your project(s) for the workshop.

Diff for "days57"