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

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Vitalenergie (Qi) und Blut (Xue),nship to pattern-matching problems is discussed..In particular, the solvability of such an equation is decided in the cases: . For this purpose, a polynomial representation and subsequently a tree representation of normal forms are introduced.

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Lecture Notes in Computer Sciencehttp://image.papertrans.cn/b/image/166192.jpg

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A Generalisation of Parikh’s Theorem in Formal Language Theoryn 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.

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Relations between Semantics and Complexity of Recursive Programsh specific aspects of automatic computing, like program structure, semantics, computational complexity. On the other side,more recently, there has been a growing need for relating results concerning the various aspects of automatic computing in order to enrich the different approaches and in order to build more adequate theories.

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Combinatorial Problems, Combinator Equations and Normal Formsnship to pattern-matching problems is discussed..In particular, the solvability of such an equation is decided in the cases: . For this purpose, a polynomial representation and subsequently a tree representation of normal forms are introduced.

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The Generative Power of Two-Level Grammarst every recursively enumerable set is generated by some such grammar, its use to the description of the full syntax of ALGOL 68 had to wait until recently [4]. The even more ambitious project of using such a grammar to give an integrated definition of both syntax and semantics of ALGOL 68 has been u