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# Previous Ateliers:
[2015 (Bordeaux)](Atelier%202015),
[2016 (Grenoble)](Atelier%202016),
[2017 (Lyon)](Atelier%202017)
[2017b (Clermont-Ferrand)](Atelier%202017b)
[2017c (Oujda)](Atelier%202017c)
[2018 (Besançon)](Atelier%202018)
[2018b (Roma)](Atelier%202018b)
[2019 (Bordeaux)](Atelier%202019)
[2019b (Roma)](Atelier%202019b)
[2020 (Grenoble)](Atelier%202020)
[2021b (Oujda)](Atelier%202021b)
[2022 (Besançon)](Atelier%202022)
[2023 (CIRM)](Atelier%202023)
[2024 (Lyon)](Atelier%202024)
# [Welcome to Atelier PARI/GP 2020 (Grenoble)](http://pari.math.u-bordeaux.fr/Events/PARI2020/)
## Tasks
- [doctesting](doc2020) (Marine, Valentin, Mohamed, Cyril, Razvan, Anne-Edgar, Samuele, Baptiste, Julien, Paul) (many reports, some already incorporated)
- Philippe (pari tutorial for teachers: arithmetics, algebra etc)
- Xavier (p-adic L-functions) (Iwasawa series working for zeta)
- Jared (morphisms between finite abelian groups) (discussions with KB and Andreas about abelian groups, in progress)
- Andreas (modular polynomials) (computed a modular polynomial, discussed CM theory and groups; debugging paritwine)
- Karim (supervise doctesting, help everyone)
- Henri (help people)
- Roland (parallel computing) (linking pari and GPUs with cypari; quite hard! problems with pari and jupyter; use cypari?)
- Francesco (enumeration of number fields with prescribed ramification) (trying to use some congruences for quintics; progress)
- Aurel (Hecke characters, p-adic fields) (found and fixed bugs, broke everything)
- Titouan (elliptic curves) (work on a benchmark)
- Maiga (hyperelliptic curves, elliptic curves) (tests with invariants, seems to work, used the software-we-cannot-name)
- Razvan (mf, modular poly) (computed a modular polynomial with Andreas, finishing slides)
- Denys (parallel computing) (working with Vinko)
- Samuele (modular forms, modular symbols, isomorphism of Galois representations) (talked to people)
- Nicolas (congruences between modular forms, mfsearch) (learning how to make patches)
- Baptiste (modular forms) (working on the small image project, talk, working with KB)
- Etienne (LLL over number fields) (finished quadratic case, slides, talk)
- Christelle (exploration of pari) (root localisation, extending to special types of polynomials, wrong algorithm -> make it correct)
- Vinko (computations with factorisations) (trying parallel programming with MPI)
- Richard (discover pari, elliptic curves over function fields) (<- did this)
- Julien (discover pari, number fields) (slacking off)
- Francois (compute Eisenstein series, products of such) (<- worked on this, found a mistake in a paper)
- Bernadette (modular symbols) (worked with Francois)
- Pascal (Hecke characters) (worked with Aurel, debugging paritwine)
- Bill (discriminants of relative polynomials) (test case provided by Jared was wrong, relative polynomial discriminant, correct test case works in 10min instead of 1h)
- Bernard (interface between Xcas and pari)
# Planning for 2.12 and 2.13
## Proposed improvements to pari
- foreach
- allow lexical variables (my) to have the same name as a built-in function (original problem: scripts break when we add new functions)
## Feature requests
Think about features you would like!
# [Welcome to Atelier PARI/GP 2024b (Lyon)](http://pari.math.u-bordeaux.fr/Events/PARI2024b/)
- Lorenzo: Exercises, continued fractions
- Bernadette: Exercices (algebraic number theory), Thue equations
- Federico: Exercises (ANT, Galois theory)
- Pip: Exercises (ANT), class field theory, modular forms
- Jessica: Exercises (ANT, Galois theory), elliptic curves
- Safia: Algebraic number theory, Polya quadratic fields, subgroups of class
groups
- Suman: Algebraic number theory, exercises (ANT, ramification)
- Roslan: Linear algebra, algebraic number theory, class field theory (future:
S-class groups)
- Luca,Nicola,Francesco: Weil height for projective spaces: implemented! (need
tests, reduce factorisation)
