In this paper we use a duality result between equations and coequations for automata, proved by Ballester-Bolinches, Cosme-Ll´opez, and Rutten to characterize nonempty classes of deterministic automata that are closed under products, subautomata, homomorphic images, and sums. One characterization is as classes of automata defined by regular equations and the second one is as classes of automata satisfying sets of coequations called varieties of languages. We show how our results are related to Birkhoff’s theorem for regular varieties.
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THEME Software (theme 1)
Publisher Springer
Series Lecture Notes in Computer Science
Conference International Conference on Mathematics of Program Construction
Note Published paper: DOI: 10.1007/978-3-319-19797-5_11
Grant This work was funded by the The Netherlands Organisation for Scientific Research (NWO); grant id nwo/612.001.210 - Enhancing efficiency and expressiveness of the coinduction proof method
Salamanca Tellez, J.R, Ballester-Bolinches, A, Bonsangue, M.M, Cosme-Llopez, E, & Rutten, J.J.M.M. (2015). Regular Varieties of Automata and Coequations. In Proceedings of International Conference on Mathematics of Program Construction 2015 (MPC 0). Springer.