# 3rd Annual Meeting - GTEM (Galois Theory and Explicit Methods)

**Monday ****7 - Friday 11 September 2009**

** Programme**

**All talks will be in Lecture Room B3.03 Mathematics Institute, Zeeman Building**

Abstracts for most talks, and slides for some, are available here

**Monday 7 September 2009**

- 08:45-09:15
**Registration**in B1.37 - 09:20-10:10
**Ronald van Luijk**(Leiden)*Two-coverings of Jacobians* - 10:15-11:00 Coffee in the Mathematics Institute Common Room
- 11:00-11:50
**Gabor Wiese**(Duisburg-Essen)*Computing congruences of modular forms modulo prime power*s - 12:00-12:50
**Tim Dokchitser**(Cambridge)*The Parity Conjecture for elliptic curves* - 13:00-14:30 Lunch in the Mathematics Institute Common Room
- 14.30-15:20
**Chris Wuthrich**(Nottingham)*Self-points and derivatives* - 15:30-16:30 Tea in the Mathematics Institute Common Room
- 16:30-17:30
**Erwin Dassen**(Leiden):*A new kind of lattice* - 18:00 Reception in Mathematics Common Room

**Tuesday 8 September 2009**

- 09:10-10:00
**Michael Stoll**(Bayreuth)*Rational 6-cycles under quadratic iteration* - 10:00-11:00 Coffee in the Mathematics Institute Common Room
- 11:00-11:50
**Paul Gunnells**(Massachusetts)*Hecke operators, automorphic forms, and the cohomology of arithmetic groups: I* - 12:00-12:50
**Laurent Berger**(Lyon)*Computing the reduction mod p of some crystalline representations* - 13:00-14:30 Lunch in the Mathematics Institute Common Room
- 14.30-15:20
**Kevin Buzzard**(Imperial)*Computing weight 1 modular forms* - 15:30-16:30 Tea in the Mathematics Institute Common Room
- 16:30-17:30
**Anna Morra**(Bordeaux):*An algorithm to compute relative cubic fields*

**Wednesday 9 September 2009**

- 09:10-10:00
*GTEM steering committee meeting on Room B1.01* - 10:00-11:00 Coffee in the Mathematics Institute Common Room
- 11:00-11:50
**Dan Yasaki**(North Carolina)*Hecke operators, automorphic forms, and the cohomology of arithmetic groups: II* - 12:00-13:00
**Arno Fehm**(Tel Aviv):*Algorithmic decidability of large fields of algebraic numbers* - 13:00-14:00 Lunch in the Mathematics Institute Common Room
- 14:00
**Excursion**to Stratford and Dinner on the boat The Countess of Evesham

**Thursday 10 September 2009 **

- 09:10-10:00
**Tom Fisher**(Cambridge)*Computing 5-coverings of elliptic curves* - 10:00-11:00 Coffee in the Mathematics Institute Common Room
- 11:00-11:50
**Jacques Tilouine**(Paris)*Abelian varieties and Siegel modular forms* - 12:00-12:50
**Wouter Castryck**(Leuven)*The statistical behavior of the number of points modulo an integer on elliptic curves over finite fields* - 13:00-14:30 Lunch in the Mathematics Institute Common Room
- 14.30-15:20
**Chris Veal**(Warwick)*Talk and discussion on postdoctoral funding opportunities*s - 15:30-16:30 Tea in the Mathematics Institute Common Room
- 16:30-17:30
**Florian Heiderich**(Barcelona):*Unification of Galois theories*

**Friday 11 September 2009**

- 09:10-10:00
**Luis Dieulefait**(Barcelona)*Methods for weight reduction and level reduction in a proof of Serre's conjecture* - 10:00-11:00 Coffee in the Mathematics Institute Common Room
- 11:00-11:50
**Alan Lauder**(Oxford)*Degenerations of hypersurfaces over finite fields* - 12:00-12:50
**Gebhard Boeckle**(Duisburg-Essen)*Fundamental domains for quaternion actions on Bruhat-Tits trees over function fields* - 13:00-14:30 Lunch in the Mathematics Institute Common Room