Titlebook: Aspects and Prospects of Theoretical Computer Science; 6th International Me Jürgen Dassow,Jozef Kelemen Conference proceedings 1990 Springe

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La segnalazione spontanea e i suoi limiti,a deterministic pushdown automaton. We prove that this family contains rational monoids, free groups and is closed under finitely generated submonoids and free products. We also consider other families of monoids of the same complexity than (PR)-monoids.

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https://doi.org/10.1007/88-470-0479-9er we show, that a hierarchy can be characterized with alternating pushdown automata, which we expect to be strict in contrast to a hierarchy with alternating finite automata or alternating space bounded automata. We describe a similar oracle hierarchy over the context-free languages, for which we c

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0302-9743 t the Sixth International Meeting of Young Computer Scientists, IMYCS ‘90. The aim of these meetings is threefold: (1) to inform on newest trends, results, and problems in theoretical computer science and related fields through a tutorial and invited lectures delivered by internationally distinguish

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La segnalazione spontanea e i suoi limiti,nding intractability results are mentioned as well. The evidence is presented why discrete neural networks (inclusively Boltzmann machines) are not to be expected to solve intractable problems more efficiently than other conventional models of computing.

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https://doi.org/10.1007/88-470-0479-9nsider and compare two possible ways of counting two-way reading on a regular language, and thus, of defining the behaviour of two-way automata. For each one definition, we show the construction of a one-way automaton equivalent in multiplicity to a given two-way automaton, this generalizing Rabin, Scott and Shepherdson‘s Theorem.