Having received multiple requests to extend the deadline, we are announcing a 1-week extension to the submission deadline for MFPS XLII, for which an updated call for papers appears below. The new submission deadline is March 12 (AoE). --- # MFPS XLII: Mathematical Foundations of Programming Semantics https://ul-fmf.github.io/mfps-sstt-2026/ ## CALL FOR PAPERS We are delighted to announce the 42nd Conference on the Mathematical Foundations of Programming Semantics (MFPS XLII). It will take place at the Faculty of Mathematics and Physics, University of Ljubljana in Ljubljana, Slovenia, from June 1-3, 2026, where it will be colocated with the 3rd Workshop on Syntax and Semantics of Type Theory (SSTT 2026), which is held from June 4-5, 2026. MFPS conferences are dedicated to the areas of mathematics, logic, and computer science that are related to models of computation in general, and to semantics of programming languages in particular. This is a forum where researchers in mathematics and computer science can meet and exchange ideas. The participation of researchers in neighbouring areas is strongly encouraged. Topics include, but are not limited to, the following: bio-computation; concurrent qualitative and quantitative distributed systems; process calculi; probabilistic systems; constructive mathematics; domain theory and categorical models; formal languages; formal methods; game semantics; lambda calculus; programming language theory; quantum computation; security; topological models; logic; type systems; type theory; denotational and operational semantics; rewrite theory; proof theory. We also welcome contributions that address applications of semantics to novel areas. Participation in the meeting is expected to be in person; one author of every accepted paper has to attend the meeting and give the presentation. Exceptions might be in case there are unexpected problems with travel/visa. Joint website of MFPS XLII and SSTT 2026: https://ul-fmf.github.io/mfps-sstt-2026/ ## INVITED SPEAKERS AND SPECIAL SESSIONS As in previous years, MFPS will have several invited speakers and special sessions highlighting areas within programming languages semantics. We are pleased to announce the following invited speakers and special sessions. ### Invited speakers There will be 4 invited speakers. * Martín Escardó (University of Birmingham) * Joost-Pieter Katoen (RWTH Aachen University) * Cristina Matache (University of Edinburgh) * Ana Sokolova (University of Salzburg) ### Special sessions There will be 2 special sessions. * Proofs and Semantics - in celebration of Alex Simpson’s 60th birthday (organised by Niels Voorneveld) * Quantitative, Graded, and Interactive Semantics (organised by Dominic Orchard) ## SUBMISSION ### Important dates * Paper submission: March 12, 2026 (AoE) (extended) * Author notification: April 23, 2026 * Conference: June 1-3, 2026 ### Submissions Submissions are made through EasyChair (https://easychair.org/conferences/?conf=mfps2026). Papers can be at most 15 pages long, excluding bibliography, and should be prepared using the MFPS macros (https://mfpsconf.org/submissions-to-mfps/). Proofs omitted due to space limitations may be included in a clearly marked appendix, to be consulted at the discretion of program committee members. ### Proceedings A preliminary version will be distributed at the meeting. Final proceedings will be published in Electronic Notes in Theoretical Informatics and Computer Science (ENTICS). This new open-access series is hosted by Episciences.org as an overlay for papers published by the CORR arXiv or HAL. ## PROGRAM COMMITTEE * Danel Ahman (University of Tartu) (co-chair) * Pierre Clairambault (CNRS and Aix-Marseille Université) * Nate Foster (Cornell University) * Helle Hvid Hansen (University of Groningen) * Tom de Jong (University of Nottingham) * Robin Kaarsgaard (University of Southern Denmark) * Ohad Kammar (University of Edinburgh) * Anja Petković Komel (Argot Collective) * Ugo Dal Lago (University of Bologna and INRIA Sophia Antipolis) * Paul Blain Levy (University of Birmingham) * Matteo Mio (CNRS/ENS-Lyon) * Max New (University of Michigan) * Valeria de Paiva (Topos Institute) * Paige Randall North (Utrecht University) * Mario Román (University of Oxford) * Jurriaan Rot (Radboud University) (co-chair) * Tarmo Uustalu (Reykjavik University and Tallinn University of Technology) * Jana Wagemaker (Radboud University) * Kazuki Watanabe (National Institute of Informatics) * Thorsten Wißmann (Friedrich-Alexander-Universität Erlangen-Nürnberg) * Noam Zeilberger (Ecole Polytechnique) ## LOCAL ORGANISER * Andrej Bauer (University of Ljubljana) ## CONTACT For any further information about MFPS 2026, please contact the PC co-chairs: Danel Ahman and Jurriaan Rot (mfps2026@easychair.org) You're receiving this message because you're a member of the Categories mailing list group from Macquarie University. 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