The International Conference on Logic for Programming, Artificial Intelligence and Reasoning (LPAR) is an academic conference aimed at discussing cutting-edge results in the fields of automated reasoning, computational logic, programming languages and their applications. Papers from previous proceedings are listed in DBLP. LPAR's slogan is "To boldly go where no reasonable conference has gone before". LPAR brings first class research and researchers to interesting places, and exposes the conference attendees to interesting cultures.

The 26th International Conference on Logic for Programming Artificial Intelligence and Reasoning (LPAR-26) will be held on Spetses, Greece, 25-30 October 2026. The proceedings of LPAR-26 will be published by EasyChair, in the EPiC Series in Computing.

Submission Guidelines

All papers must be original and not simultaneously submitted to another journal or conference. The following paper categories are welcome:

• Regular papers describing solid new research results. They can be up to 15 pages long in EasyChair style, including figures but excluding references and appendices (that reviewers are not required to read). Where applicable, regular papers are supported by experimental validation.
• Experimental and tool papers (up to 8 pages) describing implementations of systems, report experiments with implemented systems, or compare implemented systems. Experimental and tool papers should be supported by a link to the artifact/experimental evaluation available to the reviewers.

The length of regular papers is limited to 15 pages in the EasyChair style (excluding the bibliography and appendices). The length of experimental and tool papers is limited to 8 pages in the EasyChair style (excluding the bibliography and appendices). The review process is single blind.

Both types of papers must be electronically submitted in PDF via EasyChair:

https://easychair.org/conferences/?conf=lpar2026

Authors of accepted papers are required to ensure that at least one of them will be present at the conference.

List of Topics

New results in the fields of computational logic and applications are welcome. Also welcome are more exploratory presentations, which may examine open questions and raise fundamental concerns about existing theories and practices. Topics of interest include, but are not limited to:

• Abduction
• Answer set programming
• Automated reasoning
• Constraint programming
• Computational proof theory
• Decision procedures
• Description logics
• Formalizing mathematics
• Foundations of security
• Hardware verification
• Implementations of logic
• Interpolation
• Interactive theorem proving
• Knowledge representation and reasoning
• Logic and computational complexity
• Logic and databases
• Logic and games
• Logic and language models
• Logic and machine learning
• Logic and the web
• Logic and types
• Logic in artificial intelligence
• Logic programming
• Logical foundations of programming
• Logics of knowledge and belief
• Modal and temporal logics
• Model checking
• Non-monotonic reasoning
• Ontologies and large knowledge bases
• Probabilistic and fuzzy reasoning
• Program analysis
• Rewriting
• Satisfiability checking
• Satisfiability modulo theories
• Software verification
• Unification theory

LPAR steering committee

• Nikolaj Bjorner Microsoft Research
• Andrei Voronkov The University of Manchester
• Geoff Sutcliffe University of Miami