Sage Days 82 : Women in Sage (2017)
January 9  13, 2017 Paris area, France
Official French title and pun: Les SageMath Femmes
Contents
These Sage days are a special event for women* who develop in SageMath or wish to learn Sage. They will include introduction presentations, self training, and teamwork on specific projects.
This event is fully funded by the OpenDreamKit project.
*The application / invitation process is limited to women, nevertheless all activities of the workshop will be public and open to every one.
Organizers
Viviane Pons is a researcher in combinatorics and a Maître de conférences (associate professor) in ParisSud University (Orsay). She is part of the OpenDreamKit project and has been using and contributing to Sage since 2010.
Jennifer Balakrishnan works in number theory and arithmetic geometry. She is the Clare Boothe Luce Assistant Professor at Boston University. She has been using and contributing to Sage since 2006.
Jessica Striker's research is in combinatorics, with connections to algebra, geometry, and physics. She is an assistant professor at North Dakota State University and has been contributing to Sage since 2013.
Venue
The workshop is mostly organized at a rented house in RisOrangis (Paris area, RER D):
https://www.homelidays.com/hebergement/p1594881
19 bis avenue des Marronniers  91130 RISORANGIS (around 30 kilometers sotheast of Paris)
Monday morning, we will be at Institut Henri Poincaré in Paris.
Instruction to go to the house:
by train: RER D, station "RisOrangis".
From Roissy airport: take RER B up to Gare du Nord then change to RER D to RisOrangis (direction Corbeil Essone, check on the board that the train goes there)
From Orly Airport : take Orly bus to Denfert Rochereau, then RER B to Chatelet les Halles (direction north) then RER D to RisOrangis (direction Corbeil Essone, check on the board that the train goes there). Another option is to take Orlyval to Antony where you can take the RER B to Chatelet les Halles.
Application
Applications are now closed, The house is full! Nevertheless, even though we cannot provide more lodging, you are free to join us during the day. Please let us know by sending an email to: [email protected] .
Program

Monday 01/09 
Tuesday 01/10 
Wednesday 01/11 
Thursday 01/12 
Friday 01/13 
Morning 
Short presentations 
PROJECTS 
PROJECTS 
Leaving the house (9:30AM) 

Afternoon 
Back to the house 
PROJECTS 
PROJECTS 
Coding Cafe with Pyladies 
Monday talks
 Alba
 Eleni
 Lama
 Manon
 Christelle
 Judith
 Justine
Tuesday talks
 Anna, Elisa, Sorina
 Evgeniya
 Ekaterina
 Rachel
 Turku
SD 82 on SMC
SMC project (Email one of the organizers if you need access)
Workshop photo
The workshop photo is here.
Participants
 Mary Baker, Tarleton State Univ.
 Jennifer Balakrishnan, Boston Univ.
 Judith Braunsteiner, TU Wien
 Justine Falque, Univ. ParisSud
 Emily Gunawan, Gustavus Adolphus College
 Sorina Ionica, Univ. de Picardie
 Evgeniya Ishchukova, Southern Fed. Univ. Taganrog
 Rachel Karpman, The Ohio State University
 Elisa Lorenzo García, Univ. Rennes 1
 Alba Marina Málaga Sabogal, Paris 8
 Ekaterina Maro, Southern Fed. Univ. Taganrog
 Turku Ozlum CELIK, Univ. Rennes 1
 Viviane Pons, Univ. ParisSud
 Christelle Rovetta, UPMC
 MarieFrançoise Roy, Univ. Rennes 1
 Anna Somoza, Univ. Politectica de Catalunya
 Manon Stipulanti, Univ. Liege
 Jessica Striker, North Dakota State
 Lama Tarsissi, Univ. Savoie MontBlanc
 Eleni Tzanaki, Univ. of Crete
Thematics
Combinatorics of words
Lama: Christoffel words, SternBrocot tree, Continued fraction, Balanced words.
Manon: Pascal triangles, kregular sequences, abstract numeration systems, Cobham's theorems.
Discrete Geometry
Eleni: polytopes, Minkowski sum, Minkowski decomposition, hyperplane arrangements
Algebraic combinatorics
Judith: combinatorial representation theory, special orthogonal group, vacillating tableaux, branching rules
Emily: Cluster algebras, Laurent Phenomenon algebras, algebraic combinatorics, frieze pattern
Rachel: positroids, cluster algebras, flag varieties, networks
Justine: Permutation groups, profile, age algebra, relational structures
Viviane: Weak order, Tamari lattice, posets
Jessica: Plane partitions, tableaux, alternating sign matrices
Abstract Algebra
Mary: Quantum Shuffle Algebra, KLR Algebra, PBW Bases
Algorithms in real algebraic geometry
MarieFrançoise: Topology of real algebraic curves, subresultants
Perfect Simulation
Christelle: Markov chains, queueing networks, perfect simulation
Dynamical Systems
Alba: Wind trees, ergodic theory, billiards, flat surface, infinite measure preserving maps
Number Theory
Anna: Schottky problem, SatoTate conjecture
Turku Ozlum: geometry, algebra, cryptography
Arithmetic geometry
Elisa: Low genus curves, curves invariants, jacobians curves.
Cryptography
Sorina Ionica: curvebased cryptography, number theory, algorithms
Cryptanalysis of block ciphers
Ekaterina: solving nonlinear systems of equations, SAT solving, algebraic cryptanalysis
Evgeniya: Block cipher, cryptanalysis, secret key, parallel computations
Projects
Invariant of curves
Anna, Elisa, Sorina
Kummer surface
Turku Ozlum
Sage Package for KhovanovLaudaRouquier (KLR) algebras
Mary
Snake graph cluster algebra
Emily
Rachel
Implement plane partitions, descending plane partitions, increasing tableaux
Jessica
Status Reports
Viviane
 gave some presentations: sage intro, how to contribute, how to develop a package
 created a bunch of trac accounts
 answered many questions about sage, trac, git etc. Helped people with first contributions and first codes
 organized this whole week!
Jennifer
 Gave a presentation on “introduction to Sage + number theory”
 Did 5 builtfromsource installations on SMC
 Set up git terminals for development on SMC
 worked on trac #22178 with Jessica to improve documentation (Sage Developer’s Guide)
 Answered questions about Sage and trac
 Helped people push their first contributions to trac (some on local installations, some on SMC)
 Edited instructions on wiki on “how to develop Sage on SMC”
MarieFrançoise
 unfortunately participated only the two last days of the meeting
 made a few computations and pictures using SAGE to include in the paper on the complexity of computing the topology of real algebraic curves she is currently finalizing with coauthors Daouda Niang Diatta, Seny Diatta, Fabrice Rouillier and Michael Sagraloff
 understood how to use inside Sage her current experimental version of the Maxima software Sarag (Some Algorithms in Real Algebraic Geometry) based on her book Algorithms in Real Algebraic Geometry coauthored with Saugata Basu and Richard Pollack
gave a presentation to the group of the International Mathematical Union Committee for Women in Mathematics http://www.mathunion.org/cwm/
Turku
 Gave a presentation about “arithmetic via Kummer Surfaces”
 Progressed on coding in Python for the aim of developing Sage.
 Understood implementation of classes in Python
 Implemented the class of Kummer Surfaces (not generic)
 Implemented some methods in the class which allows arithmetic on Kummer Surfaces
 Understood writing documentations/descriptions for classes, methods..
 Progressed on using Sage trac system
Alba
 Gave a presentation about “physical exhibits for mathematical communication”
Understood how export to stl format works so far in Sage.
 Reviewed and validated a ticket related to this subject.
 Started using trac.sagemath.org (two tickets : one defect reported and one review) and the googlegroup sagedevel.
 Started working on a library of plot3d examples from Herwig Hauser’s gallery of singularities.
Emily
 Gave a presentation about cluster algebras and frieze patterns.
Set positive review to ticket #22160 (cluster algebra ClusterSeed documentation).
 Helped review the documentation for the following tickets:
#20918 (Jessica Striker et al’s new PlanePartition class),
#22052 (Jessica Striker et al’s new DescendingPlanePartition class),
#21254 (Implement ClusterAlgebra using ParentElement framework)
 #18680 (new Qsystems)
Answered some questions about the workflow of reviewing and editing tickets for SageMath. Gave some suggestions in regards to git and new tickets #22171 (new MotzkinWord class) and #22187 (bounded_affine_permutation in Permutation class).
Continued work on my old ticket #19160 (new class SnakeGraphs).
 Acted as a sounding board when Jennifer Balakrishnan was setting up individual git terminals on SMC at the beginning of the week.
Evgeniya
 Gave a presentation about “highspeed implementation and analysis of GOST R 34.122015”
 Progressed on coding in Python for the aim of developing Sage.
 Understood implementation of classes in Python
 Implemented the class the precomputed tables for Kuznyechik cipher
 Implemented some functions which needed to do enciphering by Kuznyechik
 Took part in the discussion of the parallelism in the sage
Manon
 Gave a short talk on Generalized Pascal triangles and binomial coefficients of words;
 Understood the link between Lama Tarsissi’s work and mine;
 Worked together with Lama on her project of finding all the paths in the SternBrocot tree that minimize a specific sequence (this project required Sage);
 Talked with Emily about a possible link between frieze pattern and binomial coefficient of words.
Lama
 Gave a talk on the WB about the Christofel words and Sternbrocot tree.
 Got interested by the work and the link between my work and Manon Stipulanti’s work which pushes us to have a common project.
 Using Sage, we had a step further in our research.
 Had lot of discussions with Emily Gunawan who tried to understand our work and find the link to hers.
Judith
 gave a short talk about SYT, orthogonal LRtableaux and vacillating paths
 learned to use git and trac and how to implement combinatorial classes
 implemented the combinatorial class Motzkin Words (including the iterator) – ticket #22171
Ekaterina
Gave presentation: “Algebraic Analysis of the Magma cipher in SageMath”.
 Improved my skills on Python programming.
 Started using trac.sagemath.org and create account.
 Created on trac new branch #22182: Magma encryption algorithm.
Progressed on using and developing in SageMath (trac hub, classes, methods, documentations, testing).
Sorina, Elis and Anna
 Gave a presentation about invariants of curves of low genus.
 Implemented Shioda invariants in Sage.
 Started using trac.sagemath.org and the sage git repository.
 Created new ticket #22173 with our implementation, now in needs_review status pending on the correction of some small details.
 Almost implemented the reconstruction of a genus 3 hyperelliptic curve from Shioda invariants in Sage. A second ticket for this part is on his way.
 Learned about parallel computing in Sage, ran a few tests and look at the timings to get an idea about parallel efficiency.
Christelle
 Gave a presentation on “Perfect sampling for closed queuing networks”
 Started to implement a Sage package
 Learned about how to make a Sage package