Our call for papers teasingly stated that

?There?s more to uncertainty than probabilities?

and set out to try and convince you that ISIPTA 2019 is a good place for discussing such matters. The paper submission deadline has passed, but rest assured, you can still present your work at ISIPTA, because poster abstract submission has opened. These poster abstracts are intended for discussing preliminary results and open questions, and also for bringing already published results to the attention of the ISIPTA audience.

Each accepted poster abstract will be announced in a one-minute plenary spotlight presentation, and the accompanying poster will be presented at length during one of the discussion sessions. Given the prominent role of poster presentations at ISIPTA, these sessions provide you with a genuine opportunity for presenting your work to the ISIPTA audience. Furthermore, as icing on the cake, presenting a poster also makes you eligible for one of our poster awards.

The deadline for poster submission is June 7. You can submit at any time before that, though, and we will provide you with a decision within two weeks. Furthermore, for poster abstracts that are submitted before May 6, we guarantee a decision announced before the early registration deadline of May 15.

Not convinced yet? Then perhaps the following features can persuade you. We?d like to highlight the availability of grants for attendees with limited funding, and the possibility of applying for the IJAR Young Researcher Award.

Basic info: ISIPTA 2019 is the 20-year anniversary edition of the world?s main forum on imprecise probabilities. It will take place in Ghent, Belgium, from 3 to 6 July 2019, and is currently open for registration. All details are available at http://isipta2019.ugent.be.

Scope: The ISIPTA conferences are devoted to robustness and imprecision in uncertainty modelling, inference and decision making, focusing in particular on uncertainty frameworks that extend or replace the probabilistic one.

Invited speakers: ISIPTA 2019 will feature keynote talks by Thomas Dietterich, Vladimir Vovk and Aharon Ben-Tal, respectively on robust AI, game-theoretic probability and robust optimization, and how these relate to imprecise probabilities. Additionally, on the occasion of ISIPTA?s 20-year anniversary, four former presidents of SIPTA will give invited talks on topics close to their hearts.

Concept: Each accepted contribution is presented and discussed, in two separate sessions. Presentations are short and always plenary. Detailed explanations and discussions are face-to-face, typically with the aid of a poster and a flipchart.

Atmosphere: ISIPTA conferences are characterised by a friendly and cooperative style, a strong emphasis on in-depth discussion and openness to new ideas. We hope that you too will enjoy and contribute to this unique atmosphere.

Venue: Ghent has been called ?Belgium?s best kept secret? by the Lonely Planet travel guide and a ?medieval masterpiece? by The Guardian. The conference takes place in an old Augustinian monastery, situated in its historic city centre.

Social programme: In order to blow off the accumulated academic steam, the programme also features several social activities, such as an opening reception at the town hall, a guided boat trip along the city centre canals, and a conference dinner with regional specialties, including some of our excellent Belgian beers.

Types of contributions: We accept long papers, short papers and poster abstracts. The deadline for papers has passed though. The deadline for poster abstract submission is the 7th of June. For poster abstracts that are submitted before the 6th of May, we guarantee a decision before the early registration deadline of May 15.

Grants: For researchers who would like to attend ISIPTA 2019, but are unable to do so due to budget constraints, we have grants available to cover (part of) the costs. Preference will be given to PhD students, but the grants are also open to more senior researchers. Information on how to apply is available on our website.

Awards: ISIPTA 2019 will hand out an IJAR Young Researcher Award (for excellent research in the area of imprecise probabilities) and several poster prizes. The former is sponsored by the International Journal of Approximate Reasoning, the latter by Wiley and Springer. The deadline for applying for the IJAR Young Researcher Award is the 7th of June; the rules for application are available on our website. Anyone who presents a poster (either for a paper or poster abstract) is eligible for the poster prizes.

We look forward to receiving your contribution and to seeing you in Ghent.

The ISIPTA 2019 Steering Committee

F. Cozman (University of Sao Paulo, Brazil)

J. De Bock (Ghent University, Belgium)

G. de Cooman (Ghent University, Belgium)

C. de Campos (Utrecht University, The Netherlands)

E. Quaeghebeur (Delft University of Technology, The Netherlands)

T. Seidenfeld (Carnegie Mellon University, USA)

G. Wheeler (Frankfurt School of Finance and Management, Germany)