Some remarks on multihead automata
I. H. Sudborough (1977)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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I. H. Sudborough (1977)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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Miloslav Nekvinda (1973)
Kybernetika
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Viliam Geffert, L'ubomíra Ištoňová (2010)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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We study the relation between the standard two-way automata and more powerful devices, namely, two-way finite automata equipped with some additional “pebbles” that are movable along the input tape, but their use is restricted (nested) in a stack-like fashion. Similarly as in the case of the classical two-way machines, it is not known whether there exists a polynomial trade-off, in the number of states, between the nondeterministic and deterministic two-way automata with nested pebbles....
Milan Šimánek (2002)
Kybernetika
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This paper concerns searching substrings in a string using the factor automaton. The factor automaton is a deterministic finite automaton constructed to accept every substring of the given string. Nondeterministic factor automaton is used to achieve new operations on factor automata for searching in non-constant texts.