By Andrew L. Szilard (auth.), Hsu-Chun Yen, Oscar H. Ibarra (eds.)

ISBN-10: 3642316522

ISBN-13: 9783642316524

ISBN-10: 3642316530

ISBN-13: 9783642316531

This e-book constitutes the refereed lawsuits of the sixteenth foreign convention on advancements in Language conception, DLT 2012, held in Taipei, Taiwan, in August 2012.
The 34 average papers awarded have been rigorously reviewed and chosen from quite a few submissions. the quantity additionally includes the papers or prolonged abstracts of four invited lectures, in addition to a distinct memorial presentation in honor of Sheng Yu. the themes coated comprise grammars, acceptors and transducers for phrases, bushes and graphs; algebraic theories of automata; algorithmic, combinatorial and algebraic houses of phrases and languages; variable size codes; symbolic dynamics; mobile automata; polyominoes and multidimensional styles; decidability questions; picture manipulation and compression; effective textual content algorithms; relationships to cryptography, concurrency, complexity conception and common sense; bio-inspired computing; quantum computing.

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Developments in Language Theory: 16th International - download pdf or read online

This e-book constitutes the refereed complaints of the sixteenth overseas convention on advancements in Language thought, DLT 2012, held in Taipei, Taiwan, in August 2012. The 34 general papers awarded have been rigorously reviewed and chosen from quite a few submissions. the amount additionally includes the papers or prolonged abstracts of four invited lectures, in addition to a unique memorial presentation in honor of Sheng Yu.

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Extra resources for Developments in Language Theory: 16th International Conference, DLT 2012, Taipei, Taiwan, August 14-17, 2012. Proceedings

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For an automaton to be oblivious, the head movement for any input word of the same length has to be the same. Computation of such model is still very restricted, as it cannot make choices of the head movement according to the input word. On the other hand it makes reasoning about the automaton much easier. This concept was examined in [3] and [6]. It was shown that even by allowing the two-way deterministic automaton to use a sublinear amount of various movement patterns (measured in the input length), it still needs exponentially more states than a 1NFA.

The predicate e(a, b) is true iff there is an edge from a to b in the input graph. Similarly, the predicate p(a, b) is true iff there is a path from a to b in the given graph and p(a, b, c) is true iff there is a path from vertex a to b with a vertex c lying on the path. For two combinations of the predicates and allowed connections we were able to show an exponential gap between 2NFAs and 2DFAs. At the same time we have shown that by extending these logics either by more complex predicates or a wider sets of allowed connections it is possible to get a pseudopolynomial upper bound on the gap between the general 2NFAs and 2DFAs in the two-way liveness problem restricted to the inputs of a polynomial length.

References 1. : On complexity of regular languages in terms of finite automata. Technical report, Institute of Computer Science, Polish Academy of Sciences, Warsaw (1977) 2. : Finite automata and unary languages. Theoretical Computer Science 47(2), 149–158 (1986) 3. : On Multipartition Communication Complexity (Extended Abstract). , Reichel, H. ) STACS 2001. LNCS, vol. 2010, pp. 206–217. Springer, Heidelberg (2001) 4. : Magic numbers in the state hierarchy of finite automata. Information and Computation 205(11), 1652–1670 (2007) 5.

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Developments in Language Theory: 16th International Conference, DLT 2012, Taipei, Taiwan, August 14-17, 2012. Proceedings by Andrew L. Szilard (auth.), Hsu-Chun Yen, Oscar H. Ibarra (eds.)


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