Titlebook: Automata, Languages and Programming; 2nd Colloquium, Univ Jacques Loeckx Conference proceedings 1974 Springer Berlin Heidelberg 1974 Automa

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Ornament

Vitalenergie (Qi) und Blut (Xue),ic context-free language, there were serious obstacles to its use in practice. The method in [17] leads to table-driven parsers in which the size. can grow exponentially with the number of productions. (An example may be found in [4].) In [18], Korenjak proposed to partition grammars to obtain small

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Vitalenergie (Qi) und Blut (Xue),-transducers. Several results (camplexity and efficiency) are established, same new and other previously proved only in special cases. As an application, we show that for every family of deterministic context-free pushdown parsers (e.g. precedence, LR(k), LL(k), ...) there is a family of general con

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Automata, Languages and Programming978-3-662-21545-6Series ISSN 0302-9743 Series E-ISSN 1611-3349

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https://doi.org/10.1007/3-211-29992-0n F when occurrences of symbols are permuted. At the same time, the methods used imply a new and simple algebraic proof of Parikh’s original theorem, directly transforming an arbitrary context-free grammar into a letter-equivalent regular grammar. Further applications are discussed.

Malfunction

https://doi.org/10.1007/3-211-29992-0It is well known that, for a given context-free grammar G, the recognition problem “x ∈ L(G)” can be decided in 0(|x|). steps by a suitable algorithm. How do extensions behave in this respect? In particular, do they admit recognition algorithms whose time is polynomially bounded by the length of the input?

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