# Announcements

#### Upcoming events

- Bethe Forum on "Constructive Methods in Number Theory", March 2nd to 6th 2015
- Lecture series on "Axions" by Kiwoon Choi (Institute for Basic Science, Korea), March 9th to 13th 2015
- XVII Workshop - Beyond the Standard Model, Bad Honnef, March 16th to 19th 2015
- Bethe Forum on "Methods for lattice field theory", March 23rd to April 2nd 2015
- Bethe Forum on "String Cosmology", June 15th to 19th 2015

Further information will be given as soon as they are available.

#### Bethe Forum on Constructive Methods in Number Theory

02.03.2015 – 06.03.2015

Dessins d'enfants and their realization as Belyi maps of compact Riemann surfaces were originally discovered by Felix Klein. Their importance and relevance was finally understood
by Alexander Grothendieck who rediscovered and named them in his "Esquisse d'un programme" in 1984. The most important aspect of dessins is the operation of the absolute Galois group on
them. Accordingly, dessins d'enfants provide fascinating insights and fundamental links between different fields of mathematics like inverse Galois theory, Teichmüller spaces,
hypermaps, algebraic number theory and mathematical physics. The related problem of the construction of Riemann surfaces with given automorphism group turns out to be rather
challenging.

Recently there have been several attempts to attack this difficult problem with some success. However we are still far from understanding what Grothendieck called the tower of Teichmüller groupoids. The goal of the workshop is to bring together experts from different fields of mathematics to share their insights and enlighten the connections between the algebraic, geometric and number theoretic aspects of the problem.

The homepage of the program can be found here.

Recently there have been several attempts to attack this difficult problem with some success. However we are still far from understanding what Grothendieck called the tower of Teichmüller groupoids. The goal of the workshop is to bring together experts from different fields of mathematics to share their insights and enlighten the connections between the algebraic, geometric and number theoretic aspects of the problem.

The homepage of the program can be found here.

#### Bethe Forum Lecture Series on Axions

09.03.2015 – 13.03.2015

Topics include

- Basics of the Strong CP Problem and Axion Solution
- Axion Models and Low Energy Couplings
- Axion-like-Particles and Other Light States
- Axions in Cosmology
- Axions in String Theory

The homepage of the program can be found here.

#### XVII Workshop - Beyond the Standard Model

16.03.2015 – 19.03.2015

From March 16th to March 19th, 2015, the yearly workshop "Beyond the Standard Model" is taking place at the Physikzentrum Bad Honnef. The workshop focuses on recent developments
in the theory of fundamental particles, the physics of the early universe, and mathematical physics. The deadline for registration is February 6th, 2015.

The topics and speakers of the pedagogical lectures are:

The topics and speakers of the pedagogical lectures are:

- Daniel Baumann (Cambridge University): Recent Developments in (String) Cosmology
- Stefano Cremonesi (King's College London): New exact Results in Supersymmetric Field Theories
- Henning Samtleben (ENS Lyon): Introduction to Exceptional Field Theory
- Eran Palti (Heidelberg University): Prospects in String Phenomenology