This is the home page of SIPTA (Society for Imprecise Probability: Theories and Applications).

Here you can find information about the conferences and the schools that the Society organizes.

We also provide some sources for information about imprecise probabilities mantained by SIPTA.

A description of the Society, its aims, articles and executive committee is reported, too.

  • The 12th Workshop on Principles and Methods of Statistical Inference with Interval Probability will take place in Durham, UK, from the 9th to the 13th of September. WPMSIIP is an annual workshop on interval probability, or more generally imprecise probability, and related statistical inference. The explicit aim of the workshop is to stimulate discussion on ongoing research and open problems. Participants can of course present recent results if relevant for such discussions, but they can also just introduce open problems. WPMSIIP 2019 returns to Durham, where the workshop series was started in 2008.
    The local organising committee is composed by Louis Aslett, Frank Coolen, Tahani Coolen-Maturi and Daniel Krpelik (Durham University). More information is available on the WPMSIIP 2019 workshop website. For any questions feel free to contact Prof Frank Coolen ( or Dr Tahani Coolen-Maturi (

  • The Eleventh International Symposium on Imprecise Probabilities: Theories and Applications took ISIPTA back to its roots: twenty years after its first edition, it returned to the medieval city centre of Ghent. What have we learned since then? Which questions still remain open? And what problems should we tackle next? The local organising committee is composed by Jasper De Bock, Gert de Cooman, Alexander Erreygers, Arne Decadt and Natan T'Joens of Ghent University. More information is available on the ISIPTA 2019 conference website.

  • SIPTA co-sponsored the 8th International Workshop on Reliable Engineering Computing (REC 2018), which took place in Liverpool, on July 16-18 2018. The workshop was organised by the Institute for Risk and Uncertainty. The event was chaired by Professor Scott Ferson, University of Liverpool. For enquiries, please email More information is available from REC 2018 webpage.

  • The Eigth SIPTA School on Imprecise Probabilities was held in Oviedo, Spain, on July 24-28 2018. The local organization was handled by the UNIMODE and the Metrology and Models Research Units of the Department of Statistics of the University of Oviedo. More information is available at the school website.

  • The 10th Workshop on Principles and Methods of Statistical Inference with Interval Probability (WPMSIIP) has taken place in Compiegne, France, from the 11 to 15 September 2017. The event was co-located with the second workshop on uncertainty in machine learning.

  • The 10th ISIPTA conference has taken place in Lugano on July 10-14 2017. The conference was co-located with the ECSQARU conference, something that might happen again in the future with other sister events.

  • The SIPTA Blog is now online! The blog is edited by our Executive Editor. Everyone in the SIPTA Community can contribute! Please contact the Executive Editor if you are interested in doing so. We see it as an electronic continuation of the Newsletter, so do not hesitate to send us contributions (reports on meetings, book or recent literature reviews, interviews, software presentations,...) or request an account in case you would like to make regular posts.

New Papers in Imprecise Probability
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  • Combining Second-Order Belief Distributions with Qualitative Statements in Decision Analysis (pdf)
  • Characterization of a coherent upper conditional prevision as the Choquet integral with respect to its associated Hausdorff outer measure (pdf)
  • Notes on desirability and conditional lower previsions (pdf)
  • Belief functions combination without the assumption of independence of the information sources (pdf)
  • Likelihood-based inference for probabilistic graphical models: Some preliminary results (pdf)
  • Exchangeable lower previsions (pdf)
  • Imprecise Probabilities based on Generalized Intervals for System Reliability Assessment (pdf)
  • Bounding Uncertainty in Civil Engineering (pdf)
  • Building knowledge-based systems by credal networks: a tutorial (pdf)
  • Representing uncertainty on set-valued variables using belief functions (pdf)
  • Conditional models: coherence and inference through sequences of joint mass functions (pdf)
  • A study of Bayesian approximations of belief functions in the probability simplex (pdf)
  • Three alternative combinatorial formulations of the theory of evidence (pdf)
  • The geometry of consonant belief functions: simplicial complexes of possibility measures (pdf)
  • A consonant approximation of the product of independent consonant random sets (pdf)
  • Bayesian Estimation with Uncertain Parameters of Probability Density Functions (pdf)
  • State Estimation with Sets of Densities considering Stochastic and Systematic Errors (pdf)
  • Nonlinear Bayesian Estimation with Convex Sets of Probability Densities (pdf)
  • Reliable hidden Markov model filtering through coherent lower previsions (pdf)
  • Multiple model tracking by imprecise Markov trees (pdf)

Last update July 31, 2019 | webmaster