The Society for Imprecise Probabilities:
Theories and Applications


The International Symposium on Imprecise Probabilities: Theories and Applications (ISIPTA) is organized every odd year, since 1999. It is the primary international forum to present and discuss new results on the theories and applications of imprecise probabilities.


The last edition of the symposium, ISIPTA 2023, was held in Oviedo, Spain, 11-14 July 2023. The symposium was open to contributions on all aspects of imprecise probabilities, including (but not limited to) sets of probability measures, partial preference orderings, game-theoretic probability, choice functions, interval probabilities, belief functions, Choquet capacities, comparative orderings, upper and lower expectations and possibility theory. For more information, visit the conference website.

The ISIPTA 2023 participants in front of the cathedral of Oviedo during the guided tour.

The guided tour during ISIPTA 2023.


[ISIPTA 2021](< was held in Granada, Spain, on July 6-9 2021. Apart from the usual theoretical and applied contributions, this event emphasised submissions of methodological tools, including software allowing the automation of the process of modelling and reasoning, contributions showing the added value of imprecision in fields where traditionally uncertainty is modelled by probability, as well as applications solving real world problems. The local organisation was handled by the UTAI group, a research group of the Department of Computer Science and Artificial Intelligence, University of Granada.

Past editions of ISIPTA

*The old name of the conference, before ISIPTA ‘05, was International Symposium on Imprecise Probabilities and Their Applications.