Call for Papers: 14th International Symposium on Imprecise Probabilities (ISIPTA 2025) - Bielefeld The 14th International Symposium on Imprecise Probabilities: Theories and Applications (ISIPTA 2025) will be held at the Bielefeld University Center for Interdisciplinary Research from Tuesday, July 15, 2025, to Friday, July 18, 2025. ISIPTA is the premier international event dedicated to the exploration of imprecise probabilities, providing a platform for both theoretical advancements and practical applications. The symposium will feature both contributed sessions and keynote talks from leading experts in the field. Keynote speakers are: • Carole Bernard (Grenoble École de Management  & Vrije Universiteit Brussel) • Itzhak Gilboa (Hautes Études Commerciales de Paris & Reichman University) • Peter Grünwald (Centrum Wiskunde & Informatica & Leiden University) • Jan Obłój (University of Oxford) We invite contributions on all aspects of imprecise probabilities, a term encompassing a wide range of mathematical and statistical models that quantify uncertainty without the restriction of precise probabilities. Topics of interest include, but are not limited to, sets of probability measures, partial preference orderings, game-theoretic probability, choice functions, interval probabilities, risk measures, nonlinear expectations, belief functions, and possibility theory. All accepted contributions will be presented and discussed in two separate sessions. Presentations are short and plenary. Detailed explanations and discussions are face-to-face relying on whichever medium you prefer – but having a poster is encouraged – so as to favour interaction among participants. We accept two types of submissions: full papers and one-page abstracts. *The submission deadline is February 2nd, 2025 for full papers and April 27th, 2025 for one-page abstracts*; additional important dates like notification of paper acceptance will be communicated in due course. Submissions are made through the EasyChair platform <https://easychair.org/conferences/?conf=isipta2025> following the formatting guidelines for submissions <https://isipta25.sipta.org/submission> on the conference website. All contributions will be made available on the conference website. Accepted papers will be published in the Proceedings of Machine Learning Research <https://proceedings.mlr.press/>, although authors have the option to opt out of publication in PLMR. *Registration is free for non-tenured scholars with accepted submission* and € 200 for tenured faculty with accepted submission. The fee for scholars without accepted submission and industry participants is € 600. The registration fee includes lunch, coffee breaks, social dinner, and participation in the social event. Registration closes on June 1st, 2025, but we encourage participants to register only after a final decision on their submission has been made. For further details, please visit the conference website: https://isipta25.sipta.org/home We look forward to welcoming you to Bielefeld! The ISIPTA 2025 Steering Committee     Jasper De Bock     Sébastien Destercke     Alexander Erreygers     Max Nendel     Frank Riedel     Matthias Troffaes