FLOPS 2026 – Call for Participation

The 18th International Symposium on Functional and Logic Programming

May 26-28, Tsukuba, Japan

https://functional-logic.org/events/flops/2026/

Welcome to the 18th International Symposium on Functional and Logic Programming (FLOPS 2026) on May 26-May 28, 2026 in Tsukuba, Japan.

FLOPS 2026 is co-sponsored by Special Interest Group on Programming and Programming Languages (SIG-PPL), Japan Society for Software Science and Technology (JSSST).

FLOPS brings together practitioners, researchers and implementers of declarative programming, to discuss mutually interesting results and common problems: theoretical advances, their implementations in language systems and tools, and applications of these systems in practice. FLOPS specifically aims to promote cross-fertilization between theory and practice and among different styles of declarative programming.

Venue

FLOPS 2026 will take place at the University of Tskukuba. Tsukuba is about 60km from central Tokyo, and easily reachable via public transport from both Haneda and Narita airports.

Tsukuba is Japan’s science and technology city. Yet, it preserves its rich traditions and local heritage with attractions such as Mt. Tsukuba and Tsukubasan Shrine.

Registration

You can register for FLOPS 2026 here:

https://functional-logic.org/events/flops/2026/registration/

Early-bird registration fee (until Apr 25) is 50000¥/20000¥ for students - roughly 275€, 325$, 240£ as of February 19.

Registration includes an excursion and a banquet on May 27. Extra banquet tickets are available.

Program

Keynote speakers:

• Kazunori Ueda, Waseda University
• Fritz Henglein, University of Copenhagen
• Gabriele Keller, Utrecht University

Tutorial:

• Jesse Alama, Scheming in Lean

Accepted papers:

• Li, F., Gupta, G.: Computing Supported Models via Transformation to Stable Models

• Miyazawa, O., Nishizaki, S.: Matrix Coeffect: A Coeffect Calculus for Handling Interdependent Information

• Arntzenius, M., Willsey, M.: Finite Functional Programming or, LAMBDA: the Ultimate Predicate

• Lam, C.: Optimizing Mesh Booleans by Being Lazy (System Description)

• Zhou, N., Jiang, C., Bierlee, H., Stuckey, P.: Dynamic Programming and Tabled Logic Programming for Encoding Single-Constant Multiplication into SAT (Declarative Pearl)

• Bohrer, R.: Demonic Dynamic Logic Programming

• Morihata, A.: Test Your Polymorphic Functions with Boolean Values

• Kiselyov, O.: More Fun with Monoids (Declarative Pearl)

• Boyland, P., Hyatt, S., Dewey, K., Hardekopf, B.: Breccia: A Functional DSL Compiled to Egglog for Test Input Generation

• Cabo, Q., Scholz, S.: Finding Programming Faults Even When Large Parts of the Code have Disappeared

• Maieli, R., Acclavio, M.: Probabilistic Linear Logic Programming with an application to Bayesian Networks computations

• Tudor, A., Arias, J., Gupta, G.: Automatic Knowledge Gap Detection and Plan Validation Using Counterfactual Justifications

• Hemann, J., Pfingsten, B.: Visualizing miniKanren Search with a Fine-Grained Small-Step Semantics

• Coltharp, N., Libby, S., Israel, L., Li, Y.: Unifying Hindsight and Foresight: Lazy Cost Analysis as Functional Logic Programming

Further information about the conference and local arrangements is available on the conference website.