Welcome to APT13


The aim of this symposium is to bring together some of the best specialists from the area of proof theory, constructivity, and computation and discuss recent trends and results in these areas. Some emphasis will be put on ordinal analysis, reductive proof theory, explicit mathematics and type-theoretic formalisms, and abstract computations.

This meeting is dedicated to the 60th birthday of Professor Gerhard J├Ąger.

The symposium will be collocated with the annual meeting of the Swiss Society for Logic and Philosophy of Science (SSLPS).