45es Journées sur les Arithmétiques Faibles

Weak Arithmetics play a fundamental role in several areas of philosophy, mathematics, and computer science, as they study the nature and properties of natural numbers within mathematical logic.

Journées sur les Arithmétiques Faibles is 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, Poland. Information about previous editions is available here. To contact the organizers, please write to jaf45warsaw@uw.edu.pl.

Invited Speakers

• Ludovic Patey, CNRS
• Albert Visser, Utrecht University
(more to be announced)

Scientific Committee

Ali Enayat • Leszek Kołodziejczyk • Mateusz Łełyk • Bartosz Wcisło

Organizing Committee

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

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Related Event

Participants may also be interested in a conference celebrating Cezary Cieśliński’s 60th birthday, which will be held in Warsaw on 19 September.