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 * ANR Project [[http://pageperso.univ-brest.fr/~jnicolas/ANRAARG/ANR_AARG.html|Analyse Asymptotique en Relativité Générale]]
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 * Volker Braun* (Berlin): ''!SageMath''  * Volker Braun* (Berlin): ''!SageMath''; ''toric geometry''
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 * Patrick Hooper* (City College of New York): ''TBA''  * Patrick Hooper* (City College of New York): ''!FlatSurf and translation surfaces in Sage''

Sage Days 74: Differential geometry and topology

Sage Days 74 will take place on May 30 - June 2, 2016 at the Workshop Center (CIAS) of Observatoire de Paris, France.


Registration is free and now open. Contact Eric ([email protected]) and Travis ([email protected]) to register.




Here is a list of possible projects. Feel free to add your own to the list.

  • SageManifolds inclusion into Sage.

  • Lie algebras #14901 and implement their relationship with manifolds.

  • CW/Cube complexes by generalizing the manifold classes.
  • Computation of geodesics on pseudo-Riemannian manifolds.
  • Include the sage.geometry.riemannian_manifolds (i.e. parametrized surfaces) into the more general framework of SageManifolds.

  • Experiment plotting possibilities with OpenGL (nice stuff from SnapPy!) and more... what could be supported by a browser?

  • Persistent homology.
  • Simplicial sets. (Co)simplicial objects in various categories.
  • Incorporation of Kenzo?



We recommend to book some hotel in Paris, in Montparnasse area (14th arrondissement).

More details soon...


Meudon is located at 10 min by train from Montparnasse station in Paris. A system of car shuttle will be organized from Meudon station to the workshop center (CIAS).

If you plan instead to come by your own, please follow these access instructions (click on the map to enlarge it; the CIAS is located in BAT. 9).

More details soon...


European participants from an OpenDreamKit node are expected to cover their expenses from their OpenDreamKit funds.



  • Mark Bell* (University of Illinois, Urbana-Champaign): Flipper and Sage

  • Volker Braun* (Berlin): SageMath; toric geometry

  • Marc Culler* (University of Illinois, Chicago): SnapPy

  • Vincent Delecroix* (University of Bordeaux): Riemannian manifolds

  • Nathan Dunfield* (University of Illinois, Urbana-Champaign): SnapPy

  • Patrick Hooper* (City College of New York): FlatSurf and translation surfaces in Sage

  • Marcin Kostur* (University of Silesia, Katowice): 3D visualization

  • Jeremy L. Martin* (University of Kansas, Lawrence): CW complexes

  • John Palmieri* (University of Washington, Seattle): simplicial sets

  • Thibaut Paumard* (Observatoire de Paris): Gyoto code and geodesics

  • Nicolas Thiéry* (University Paris Sud): Modelling mathematics in Sage (parents, elements, categories, ...)

(* denotes confirmed)


  • Michal Bejger (N. Copernicus Astronomical Center, Warsaw)
  • Mark Bell (University of Illinois, Urbana-Champaign)
  • Volker Braun (Berlin)
  • Marc Culler (University of Illinois, Chicago)
  • Vincent Delecroix (University of Bordeaux)
  • Nathan Dunfield (University of Illinois, Urbana-Champaign)
  • Eric Gourgoulhon (Observatoire de Paris)
  • Patrick Hooper (City College of New York)
  • Marcin Kostur (University of Silesia, Katowice)
  • Samuel Lelièvre (University Paris Sud)
  • Marco Mancini (Observatoire de Paris)
  • Jeremy L. Martin (University of Kansas, Lawrence)
  • John Palmieri (University of Washington, Seattle)
  • Thibaut Paumard (Observatoire de Paris)
  • Travis Scrimshaw (University of Minnesota)
  • Nicolas Thiéry (University Paris Sud)
  • Anne Vaugon (University Paris Sud)


  • Eric Gourgoulhon (Observatoire de Paris)
  • Marco Mancini (Observatoire de Paris)
  • Travis Scrimshaw (University of Minnesota)

days74 (last edited 2016-06-14 18:11:36 by mkostur)