# On Classes of Regular Languages Related to Monotone WQOs

Abstract : We study relationships of monotone well quasiorders to regular languages and $\omega$-languages, concentrating on decidability of the lattices of upper sets on words and infinite words. We establish rather general sufficient conditions for decidability. Applying these conditions to concrete natural monotone WQOs, we obtain new decidability results and new proofs of some known results.
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https://hal.inria.fr/hal-02387304
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Submitted on : Friday, November 29, 2019 - 4:36:28 PM
Last modification on : Tuesday, January 14, 2020 - 10:48:09 AM

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Mizuhito Ogawa, Victor Selivanov. On Classes of Regular Languages Related to Monotone WQOs. 21th International Conference on Descriptional Complexity of Formal Systems (DCFS), Jul 2019, Košice, Slovakia. pp.235-247, ⟨10.1007/978-3-030-23247-4_18⟩. ⟨hal-02387304⟩

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