IWC 2026
15th International Workshop on Confluence
24th July, 2026, Lisbon, Portugal
Co-located with FSCD and IJCAR @ FLOC 2026
News
- January 13th, 2026: CFP launched.
- January 3rd, 2026: Webpage created.
Background
Confluence provides a general notion of determinism and has been conceived as one of the central properties of rewriting systems. Confluence relates to many topics of rewriting (completion, modularity, termination, commutation, etc.) and has been investigated in many formalisms of rewriting, such as first-order rewriting, lambda-calculi, higher-order rewriting, constraint rewriting, conditional rewriting, and so on. Recently there is a renewed interest in confluence research, resulting in new techniques, tool support, confluence competition, and certification as well as in new applications. The scope of the workshop is all these aspects of confluence and related topics.
The goal of the workshop is to provide a forum for researchers interested in the topic of confluence to exchange and share new developments in the field. The workshop will enable discussion on theoretical results, new problems, applications, implementations and benchmarks, and share the current state-of-the-art on the development of confluence tools.
Topics are thus:
- confluence
- unique normal forms
- commutation
- ground confluence
- completion
- critical pair criteria
- decidability issues
- complexity issues
- certification
- applications of confluence
The 15th Confluence Competition CoCo 2026 will run live during IWC 2026.
Registration
Registration is possible via the FLoC website: https://www.floc26.org/registration.
Note that early registration ends on May 15th, 2026.
Important Dates
- submission (abstract): 1st March, 2026
- submission (paper): 9th March, 2026
- notification: 9th April, 2026
- early registration: 15th May, 2026
- final version: 1st June, 2026
- workshop: 24 July, 2026
(deadlines are AoE)
Call for Papers
Submission
We solicit short papers or extended abstracts of at most five pages excluding references. There will be no formal reviewing. In particular, we welcome short versions of recently published articles and papers submitted elsewhere. The program committee checks relevance and may provide additional feedback. The accepted papers will be made available electronically before the workshop.
The page limit for papers is 5 pages (excluding references, but 6 pages in total) in EasyChair style (6 pages excluding references, but 7 pages in total in the final version). Submission is electronically through
Program Committee
- Takahito Aoto, Niigata Univeristy
- Thiago Felicissimo, INRIA
- Carsten Fuhs, Birkbeck, University of London
- Raúl Gutiérrez, Universitat Politècnica de València (co-chair)
- Ievgen Ivanov, Taras Shevchenko National University of Kyiv
- Misaki Kojima, Nagoya University
- René Thiemann, University of Innsbruck (co-chair)
- Vincent van Oostrom, University of Sussex
IWC Steering Committee
Previous IWCs
- 1st IWC, Nagoya, 2012
- 2nd IWC, Eindhoven, 2013
- 3rd IWC, Vienna, 2014
- 4th IWC, Berlin, 2015
- 5th IWC, Obergurgl, 2016
- 6th IWC, Oxford, 2017
- 7th IWC, Oxford, 2018
- 8th IWC, Dortmund, 2019
- 9th IWC, Paris, 2020
- 10th IWC, Buenos Aires/online, 2021
- 11th IWC, Haifa, 2022
- 12th IWC, Obergurgl, 2023
- 13th IWC, Tallinn, 2024
- 14th IWC, Leipzig, 2025
Contact
- Raúl Gutiérrez: raguti(at)upv.es
- René Thiemann: rene._mylastname_(at)uibk.ac.at