Results 31 to 40 of about 43,033 (311)
From Automata to Multiautomata via Theory of Hypercompositional Structures
Mathematics, 2021 In this paper, we study two important problems related to quasi-multiautomata: the complicated nature of verification of the GMAC condition for systems of quasi-multiautomata, and the fact that the nature of quasi-multiautomata has deviated from the ...
Štěpán Křehlík +2 more
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Equivalence checking for weak bi-Kleene algebra [PDF]
Logical Methods in Computer Science, 2021 Pomset automata are an operational model of weak bi-Kleene algebra, which describes programs that can fork an execution into parallel threads, upon completion of which execution can join to resume as a single thread.
Tobias Kappé +4 more
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Minimization of visibly pushdown automata is NP-complete [PDF]
Logical Methods in Computer Science, 2020 We show that the minimization of visibly pushdown automata is NP-complete. This result is obtained by introducing immersions, that recognize multiple languages (over a usual, non-visible alphabet) using a common deterministic transition graph, such that ...
Olivier Gauwin +2 more
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The Power-Set Construction for Tree Algebras [PDF]
Logical Methods in Computer Science, 2023 We study power-set operations on classes of trees and tree algebras. Our main result consists of a distributive law between the tree monad and the upwards-closed power-set monad, in the case where all trees are assumed to be linear.
Achim Blumensath
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Decidability of multiset, set and numerically decipherable directed figure codes [PDF]
Discrete Mathematics & Theoretical Computer Science, 2017 Codes with various kinds of decipherability, weaker than the usual unique decipherability, have been studied since multiset decipherability was introduced in mid-1980s.
Włodzimierz Moczurad
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Transfinite Lyndon words [PDF]
Logical Methods in Computer Science, 2020 In this paper, we extend the notion of Lyndon word to transfinite words. We prove two main results. We first show that, given a transfinite word, there exists a unique factorization in Lyndon words that are densely non-increasing, a relaxation of the ...
Olivier Carton, Luc Boasson
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Most Complex Regular Ideal Languages [PDF]
Discrete Mathematics & Theoretical Computer Science, 2016 A right ideal (left ideal, two-sided ideal) is a non-empty language $L$ over an alphabet $\Sigma$ such that $L=L\Sigma^*$ ($L=\Sigma^*L$, $L=\Sigma^*L\Sigma^*$). Let $k=3$ for right ideals, 4 for left ideals and 5 for two-sided ideals. We show that there
Janusz Brzozowski +2 more
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A Characterization of Morphic Words with Polynomial Growth [PDF]
Discrete Mathematics & Theoretical Computer Science, 2020 A morphic word is obtained by iterating a morphism to generate an infinite word, and then applying a coding. We characterize morphic words with polynomial growth in terms of a new type of infinite word called a $\textit{zigzag word}$.
Tim Smith
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Resynchronized Uniformization and Definability Problems for Rational Relations [PDF]
Discrete Mathematics & Theoretical Computer Science, 2023 Regular synchronization languages can be used to define rational relations of finite words, and to characterize subclasses of rational relations, like automatic or recognizable relations.
Christof Löding, Sarah Winter
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New tools for state complexity [PDF]
Discrete Mathematics & Theoretical Computer Science, 2020 A monster is an automaton in which every function from states to states is represented by at least one letter. A modifier is a set of functions allowing one to transform a set of automata into one automaton.
Pascal Caron +3 more
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