16-19 April 2012, Proof Theory and Modal Logic, Barcelona, Spain

A Π⁰₁ ordinal analysis of Peano arithmetic can be based on provability logics with infinitely many modalities. The aims of the workshop are to report and to discuss progress on extending the analysis to stronger theories, as well as to study the corresponding logics and algebras from topological, set-theoretical and algebraic points of view.

Topics include but are not restricted to: reflection principles; Turing--Feferman recursive progressions; provability logics and algebras; conservation results for fragments of arithmetic and analysis; ordinal notation systems; topological and set-theoretic interpretations of modal logic.

To register, please contact Joost J. Joosten at jjoosten at ub.edu by April 10th. There is a registration fee of 80€. Upon registration you will receive information on the method of payment. Students and young researchers that wish to waive the fee should mention this when registering.

For more information, see http://www.phil.uu.nl/~jjoosten/WormShop/.