Sage Days 64: Algebraic Combinatorics
General Information
The goal of these Sage Days is to bring together developers in algebraic combinatorics, Lie theory, and representation theory to discuss needed features and develop code. People who have coded in Sage and would like to get help getting their code integrated into Sage are also welcome to join. Any level of Sage experience is welcome, however there will not be basic (python) programming tutorials. We encourage people who wish to participate to have an understanding of basic python (there are numerous tutorials available online and books available if you want to learn) and basic objectoriented programming (OOP for short). A longer list of Sage tutorials are available online as well.
We would like to point out that a combinatorics related workshop will be held at AIM the following week for people who would like to combine the two, see AIM workshop.
When & Where
March 1720, 2015 at UC Davis.
Registration
Registration is now closed due to space limitations and funding decisions have been made. If you have questions about registration, email either Anne (anne at math.ucdavis.edu) or Travis (tscrim at ucdavis.edu).
Lodging
We have the following "official" conference hotels. To get the specified room rates, when making the reservation mention that you are with "Sage Days". You need to book your room before February 3, 2015 to get the special rates.
Aggie Inn (530)7560352 Conference rate of $114  134 a night.
Best Western University Lodge $95 a night.
There is also the following recommendation:
Econolodge (make sure you pick the one in Davis)
If you are receiving funding, please contact Matt Silver (mtsilver at math.ucdavis.edu) to reserve a room.
Transportation
The nearest airport is Sacramento International (SAC), and are multiple ways to get to UC Davis. There is bus route 42. There is also an airport shuttle.
The two other nearby major airports are San Francisco International (SFO) and Oakland International (OAK). From both airports, a combination of BART and Amtrak can be used to get to UC Davis. In particular, there is the Capital Corridor line at either the Oakland Coliseum or Richmond BART stations.
See also: https://www.math.ucdavis.edu/about/directions/
Schedule
All talks and coffee breaks will be in Mathematical Sciences Building (MSB) 1147. Coding sprints will take place in MSB 1147, MSB 3240, MSB 3236, MSB 3106 (after 3pm on Wednesday).
Tuesday 3/17 

9:30 AM 
Coffee break 

10  11 AM 
Nicolas Thiéry 
Introduction to Sage Development I 
11  12 AM 
Franco Saliola 
Introduction to Sage Development II 
12  12:30 PM 
Introductions and discussions of projects 

12:30  1:30 PM 
Lunch 

3:30 PM 
Coffee break 

Wednesday 3/18 

9:30 AM 
Coffee break 

10  11 AM 
Vivien Ripoll & JeanPhilippe Labbé 
Computing and displaying infinite root systems 
11  12 AM 
Mark Shimozono 
Implementation of double affine Hecke algebra in Sage 
12  1:30 PM 
Lunch 

1:302:15pm 
Eric Gourgoulhon 
Introduction to SageManifolds (slides, example worksheet) 
3:30 PM 
Coffee break 

Thursday 3/19 

9:30 AM 
Coffee break 

10  11 AM 
Nathan Williams 
Sage Days dim(V_{\rho}(A_3)) 
11  12pm 
Nicolas Thiéry 
Writing a parent and a category in Sage: Jupyter notebook pdf 
12  1 PM 
Lunch 

3:30 PM 
Coffee break 

Friday 3/20 

9:30 AM 
Coffee break 

10 AM 
Everyone 



Cool Pictures in combinatorics (add more!) 



12  1 PM 
Lunch 

3:30 PM 
Coffee break 
All other time will be devoted to coding sprints.
Projects
If you have any projects that you'd want to work on, please add them. If you want to work on any project listed, just add your name.
Extended affine Weyl groups (#15375)  Dan Bump, Anne Schilling, Mark Shimozono, Nicolas Thiéry, Mee Seong Im
Lie algebras (#14901)  Travis Scrimshaw, Mee Seong Im, Darij Grinberg, Daniel Bump
 Root (and Weight) multiplicities of KacMoody algebras  KyuHwan Lee, Ben Salisbury, Jonathan Judge, Daniel Bump
Hyperbolic Cartan types (#15974)  Travis Scrimshaw
Related with limit roots in hyperbolic types (#16087)
Might also be useful: http://trac.sagemath.org/ticket/15703
Infinite root systems of Coxeter groups, and visualization (#16087 and #15703)  JeanPhilippe Labbe and Vivien Ripoll
Lie groups (in connection with SageManifolds #14865)  Eric Gourgoulhon, Travis Scrimshaw, Mee Seong Im
Generalized toggle groups (#17978) and homomesy  Jessica Striker, Emily Gunawan
Snake graph formula for curves on cluster algebra triangulations (#16310)  Emily Gunawan
 Implement categories and general framework for representations  Travis Scrimshaw, Mee Seong Im, Nicolas Thiéry, Franco Saliola, Aladin Virmaux
Alternating sign matrices (implement fully packed loops, map to link pattern, fix corner sum matrix (#17977)  Jessica Striker, Emily Gunawan
Crystal morphisms, subcrystals, and virtual crystals (#15463)  Travis Scrimshaw, Anne Schilling, Daniel Bump
Refactoring (skew) tableau(x) classes  Darij Grinberg, Travis Scrimshaw (#17983)
Work on #17979 to do something about IntegerListsLex and the associated Partitions / Compositions bugs #17548, #17956, #17920  Bryan Gillespie, Anne Schilling, Nicolas Thiery
 Finalize the following stack of tickets:
Work toward integrating #16659 (decomposition of finite dimensional associative algebras)  Nicolas Thiéry, Franco Saliola, Aladin Virmaux
 Quiver Hecke and related algebras (basic algebraic structure)  Travis Scrimshaw, Peter Tingley, Mee Seong Im, KyuHwan Lee, Ben Salisbury, Jonathan Axtell, Sandi Xhumari, TzeChun Ou, Jonathan Judge
Speakers
 Vivien Ripoll (Universitaet Wien)
 Franco Saliola (UQAM)
 Mark Shimozono (Virginia Tech)
 Nicolas Thiéry (LRI, Universite Paris Sud)
 Nathan Williams (LaCIM)
Participants
 P. Akhilesh (HarishChandra Research Institute, Allahabad, India)
 Jonathan Axtell (Iowa State University)
 Robert Bassett (UC Davis)
 Michał Bejger (N. Copernicus Astronomical Center)
 Dan Bump (Stanford)
 James Campbell (Cardiff School of Mathematics)
 Federico Castillo (UC Davis)
 Tom Denton (Youtube)
 Kevin Dilks (University of Minnesota)
 Brendon Dutra (UC Davis)
 Matt Erbst (Software Engineer)
 Bryan Gillespie (UC Berkeley)
 Darij Grinberg (MIT)
 Eric Gourgoulhon (Observatoire de Paris)
 Emily Gunawan (University of Minnesota)
 Mee Seong Im (University of Illinois  UrbanaChampaign)
 Jonathan Judge (University of Connecticut)
 Jan Keitel (MaxPlanckInstitut für Physik)
 Vince Knight (Cardiff School of Mathematics)
 JeanPhilippe Labbe (Jerusalem)
 Hyeonmi Lee (Hanyang University/UC Davis)
 KyuHwan Lee (University of Connecticut)
 Maria Monks Gillespie (UC Berkeley)
 TzeChun Ou (University of Connecticut)
 Chris Patton (UC Davis)
 Oliver Pechenik (University of Illinois  UrbanaChampaign)
 Jim Propp (UMass Lowell)
 Vivien Ripoll (Universitaet Wien)
 Tom Roby (University of Connecticut)
 Franco Saliola (UQAM)
 Ben Salisbury (Central Michigan University)
 Dmitry Shemetov (UC Davis)
 Mark Shimozono (Virginia Tech)
 Jessica Striker (North Dakota State University)
 Joshua Swanson (University of Washington)
 Marko Thiel (Universitaet Wien)
 Nicolas Thiéry (LRI, Universite Paris Sud)
 Peter Tingley (Loyola)
 Bolor Turmunkh (University of Illinois  UrbanaChampaign)
 Aladin Virmaux (LRI, Universite Paris Sud)
 Nathan Williams (LaCIM)
 Sandi Xhumari (University of Connecticut)
Organizers
 Dan Bump (Stanford)
 Anne Schilling (UC Davis)
 Travis Scrimshaw (UC Davis)