Titlebook: Automata, Languages and Programming; Fourth Colloquium, U Arto Salomaa,Magnus Steinby Conference proceedings 1977 Springer-Verlag Berlin He

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Militia

摘要

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Parsing and syntactic error recovery for context-free grammars by means of coarse structures,its main applications: we showed that two-level parsing by means of coarse structures can simplify the parsing process and that the concept of coarse structures can advantageously be used for syntax error recovery using global rather than local context of the error position.

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,On the time and tape complexity of hyper(1)-AFL’s,)-AFL, too. Thus we study the family of block-indexed languages. We show that this family is a hyper(1)-AFL which is not a hyper-AFL and that it is contained in the family of languages log(n)-tape reducible to the context-free languages. This implies that the family of block-indexed languages, toget

排出

Renaming and erasing in szilard languages,e. a language generated by such grammar) then L -{λ} is a coding (renaming) of some Szilard language. This result shows that arbitrary homomorphisms do not have more generating power than nonerasing ones except that they generate the empty word. Combining this result with other properties of label l

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Esophagus

Some recursively unsolvable problems relating to isolated cutpoints in probabilistic automata,

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