The LSV seminar takes place on Tuesday at 11:00 AM. The usual location is the conference room at Pavillon des Jardins (venue). If you wish to be informed by e-mail about upcoming seminars, please contact Stéphane Le Roux and Matthias Fuegger.
The seminar is open to public and does not require any form of registration.
We define generalized Goodstein sequences with respect to the Ackermann function. Depending on the choice of the starting function the resulting Goodstein principles will then be of varying large complexity and not be provable in first Peano order arithmetic and related theories. The results are partly in joint work with T. Arai and S. Wainer.