Work

Unambiguous Acceptance of Thin Coalgebras

Year: 2025

Type: article

Abstract: Automata admitting at most one accepting run per structure, known as unambiguous automata, find applications in verification of reactive systems as they extend the class of deterministic automata whilst maintaining some of their desirable properties. In this paper, we generalise a classical construction of unambiguous automata from thin trees to thin coalgebras for analytic functors. This achieves two goals: extending the existing construction to a larger class of structures, and providing conceptual clarity and parametricity to the construction by formalising it in the coalgebraic framework. As part of the construction, we link automaton acceptance of languages of thin coalgebras to language recognition via so-called coherent algebras, which were previously introduced for studying thin coalgebras. This link also allows us to establish an automata-theoretic characterisation of languages recognised by finite coherent algebras.

Source: Electronic Notes in Theoretical Informatics and Computer Science

DOI: 10.46298/entics.16832

Authors: Anton Chernev, Corina Cîrstea, Helle Hvid Hansen, Clemens Kupke

Institutions: University of Groningen, University of Southampton, University of Strathclyde

Language: English

Topic: semigroups and automata theory

Subfield: Computational Theory and Mathematics

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Funder: Leverhulme Trust

Award: G3744044676