Mathematical logic has developed from the foundational debates of
the early 20th century into a deep and respected subfield of
mathematics. The solution (or rather proof of unsolvability) of
many mathematical problems by the technique of forcing, the
connections between modern algebra and model theory, and other
achievements of mathematical logic have established a
mathematically active field of research with a strong feeling of
coherence, often coordinated on the national level by learnèd
societies as the
AILA (Italy),
the
BLC (Great Britain),
the
DVMLG (Germany), and the
VvL (The Netherlands).

Some parts of mathematical logic are intricately connected to
mainstream mathematics (algebra, geometry, number theory, ergodic
theory, etc.), other parts are more foundational. We stress that
both parts of mathematical logic are important for the coherence
of mathematical logic as a field. At the minisymposium at the 5ECM, we intend to represent both
foundational work in mathematical logic and the connections to
mainstream mathematics, organized in the framework of the
traditional areas of mathematical logic.

The year 2008 marks the 100th anniversary of Evert Beth's birthday.
The important Dutch logician Beth worked in the field of logic in the
broad sense, philosophy of exact sciences, and the history of logic and
philosophy of science, and founded the *Instituut voor
Grondslagenonderzoek en Filosofie der Exacte Wetenschappen* in
Amsterdam in 1952. As member of the *Koninklijke Nederlandse Akademie van
Wetenschappen* and as one of the editors of the important book
series *Studies in logic and the foundations of mathematics*, he
played an crucial role in building the strong reputation that logic has in
the Netherlands. The Evert Willem Beth
Stichting is working towards the goal of continuing the work of Beth
and is funding this minisymposium in order to commemorate Evert Beth.

**Organizers.**

Peter Koepke (Bonn,
*Germany*), Benedikt Löwe (Amsterdam, *The Netherlands*), Jaap van Oosten (Utrecht, *The
Netherlands*)

**Invited Speakers.**

*(Click on the titles of the talks to see the abstracts.)*

- Mirna Dzamonja, University
of East Anglia, England:
**Combinatorics of trees**.
- Sy Friedman,
Universität Wien, Austria:
**Consistency completeness**.
- Mai Gehrke, Radboud
Universiteit, The Netherlands:
**Duality
theory as a Rosetta Stone for relational semantics**.
- Erik
Palmgren, Uppsala Universitet, Sweden:
**Point-free topology
versus topology according to Brouwer and
Bishop**.
- Giovanni Sambin,
Università di Padova, Italy:
**Minimalist foundation and
pluralism in mathematics:
computation and structure in topology**.
- Katrin Tent,
Universität Münster, Germany:
**Simplicity of certain
automorphism groups**.
- Boban Velickovic,
Université Paris 7, France:
**PCF structures of height less than
ω**_{3}

**Sponsors.**

Associazione Italiana di Logica
e sue Applicazioni,
British Logic Colloquium,
Deutsche Vereinigung für Mathematische
Logik und für Grundlagen der Exakten Wissenschaften,
Evert Willem Beth Stichting,
Vereniging voor Logica en
Wijsbegeerte der Exacte
Wetenschappen.