Monadic MSO logic

Prelegent(ci)

Bartek Klin

Afiliacja

Uniwersytet Warszawski

Termin

15 kwietnia 2020 14:15

Informacje na temat wydarzenia

Online seminar

Seminarium

Seminarium „Teoria automatów”

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The correspondence of regular languages and monadic second-order logic relies on the fact that the class of regular languages is closed under images of surjective letter-to-letter homomorphisms. This closure property holds for finite words, but also for infinite words, finite or infinite trees, and more generally for a wide range of monads. However, it does not hold always, and a structural characterization of those monads for which it does hold seems elusive. I will focus on a few examples to illustrate how subtle the condition can be.

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