Celebrate Cezary Cieśliński’s 60th birthday with us!

On 19 September 2026, we will be meeting at the University of Warsaw to celebrate Cezary Cieśliński’s 60th birthday. On this occasion, senior and junior researchers will exchange ideas on topics Prof. Cieśliński has contributed to.

Invited Speakers

– Ali Enayat (University of Gothenburg)
– Volker Halbach (University of Oxford)
– Leon Horsten (University of Konstanz)
– Albert Visser (University of Utrecht)

Organising Committee:

Mateusz Łełyk • Luca Castaldo • Michał Gil Sanchez • Maciej Głowacki • Piotr Gruza • Katarzyna Kowalik • Konstantinos Papafilippou • Bartosz Wcisło • Michał Wrocławski • Matteo Zicchetti

Related Event

Participants may also be interested in a JAF conference, an annual conference that brings together researchers working on or applying weak arithmetics in different fields and formalisms. The 45th edition will take place on 16⁠–⁠18 September 2026 in Warsaw.