This workshop is in memory of, and in honour of, Pavlos Peppas. Pavlos was a leading researcher in Knowledge Representation and Reasoning (particularly Belief Revision), and a friend, colleague, or mentor to a great many people in the KR community and beyond.

The workshop will tentatively include submitted papers, an invited speaker, and a workshop dinner at a local (Greek, of course) restaurant. Submissions will be reviewed and an informal proceedings posted online.

Submissions may include the following types of papers:

• People who have co-authored papers with Pavlos could present their favourite paper with Pavlos perhaps along with a reflection on Pavlos. Authors may opt to submit an edited summary of the presented work for inclusion in the workshop proceedings.

• People who have published work that builds on one of Pavlos’ publications could present on their publication. As with the preceding, authors may opt to submit an edited summary of the presented work for inclusion in the workshop proceedings.

• Proposals could be received on new work that builds on or references Pavlos’s publications. These would be published in a workshop proceedings.

• Other work that builds on or references Pavlos’s work is welcome. Please contact the organisers if you would like to discuss a possible presentation.

• Subject to consultation and approval of the KR-2025 and NMR-2025 Chairs, a precis of a submission to KR 2025 or NMR 2025 that falls into one of the categories above may be submitted to the workshop.

• Dr. Theofanis Aravanis, University of the Peloponnese, Greece

• Professor Emeritus James P. Delgrande, Simon Fraser University, Canada

• Professor Gabriele Kern-Isberner, TU Dortmund University, Germany

• Professor Maurice Pagnucco, University of New South Wales, Australia

• Professor Mikhail Prokopenko, The University of Sydney, Australia

• Professor Mary-Anne Williams, The University of New South Wales, Australia

• Professor Emeritus Gerhard Brewka, University of Leipzig, Germany

• Emeritus Professor Samir Chopra, USA

• Professor Giuseppe de Giacomo, Oxford University, UK

• Professor Thomas Eiter, TU Vienna, Austria

• Professor Esra Erdem, Sabanci University, Turkey

• Professor Eduardo Ferme, University of Madeira, Portugal

• Professor Randy Goebel, The University of Alberta, Canada

• Associate Professor Aleksander Ignjatovic, The University of New South Wales

• Professor Gerhard Lakemeyer, RWTH Aachen, Germany

• Professor Pierre Marquis, University of Artois and CNRS, France

• Professor Sheila McIlraith, The University of Toronto, Canada

• Professor Tommie Meyer, University of Cape Town, South Africa

• Professor Jochen Renz, Australian National University, Australia

• ​​Professor Hans Rott, University of Regensburg, Germany

• Dr Kai Sauerwald, University of Hagen, Germany

• Professor Torsten Schaub, Potsdam University, Germany

• Dr Steven Shapiro, The University of Toronto, Canada

• Professor Sylvie Thiebaux, Australian National University

• Professor Matthias Thimm, University of Hagen, Germany

• Professor Francesca Toni, Imperial College London, UK

• Professor Son Tran, New Mexico State University, USA

• Professor Emeritus Mirek Truszczynski, University of Kentucky, USA

Paper submission: August 4, 2025

Paper notification: August 21, 2025

Workshop date and time: Half-day during November 13, 2025

12:30 – 13:30: Lunch

13:30 – 15:30: Session 1: Recaps of Papers Published with Pavlos Peppas

13:30 – 13:50: Welcome
13:50 – 14:10:

General Belief Revision: Extended Summary
James Delgrande, Pavlos Peppas and Stefan Woltran

14:10 – 14:30:
Causality and Minimal Change Demystified (IJCAI-2001)
Maurice Pagnucco and Pavlos Peppas

14:30 – 14:50:
Constructive Modelings for Theory Change (Notre Dame Journal of Formal Logic 36(1): 120-133, Winter 1995)
Pavlos Peppas and Mary-Anne Williams

14:50 – 15:10:
Gabriele Kern-Isberner, Alexander Hahn and Pavlos Peppas
Epistemic Syntax Splitting – Links to Propositional Splitting and an Algorithmic Approach

15:10 – 15:30:
Revision vs. Update: Taking a Closer Look (ECAI-1996)
Pavlos Peppas, Abhaya C. Nayak, Maurice Pagnucco, Norman Y. Foo, Rex Bing Hung Kwok, Mikhail Prokopenko

15:30 – 16:00: Afternoon Tea/Coffee

16:00 – 17:30: Session 2: Papers Influenced by Pavlos Peppas

16:00 – 16:20:

Incompatibility of Parametrized-Difference and Theory-Relational Belief Revision

Theofanis Aravanis

16:20 – 16:40:

Undecidability and the edge of chaos: from the Liar Paradox to the Game of Life information on submission

Mikhail Prokopenko, Michael Harre, Ori Livson and Joseph Lizier

16:40 – 17:00:

An Analysis of The Role of Syntax in Inductive Inference
Jesse Heyninck, Richard Booth, Thomas Meyer and Lars-Phillip Spiegel

17:00 – 17:30:

Reflections from workshop participants

18:00 – 21:00: Dinner (venue to be confirmed)