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Tabulator-Turingmaschine und Komplexität

Tabulator-turing machine and complexity

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Zusammenfassung

Es wird ein „Tabulator-Turingmaschine” genanntes Modell einer Turingmaschine definiert, die in einem Schritt mehrere Felder ihres Bandes überspringen kann und dadurch einer realen Datenverarbeitungsanlage näher kommt als eine Turingmaschine der üblichen Definition. Es wird gezeigt, daß diese Maschine zu anderen Komplexitätsklassen führen kann als eine normale mehrbändige Turingmaschine. Als Anwendung wird die Komplexität verschiedener Erkennungsverfahren für kontextfreie Sprachen angegeben.

Summary

A new model of a Turing Machine, called “Tabulator Turing Machine”, is defined. It can shift its head over several squares of the tape and is therefore more similar to a real computer than a normal Turing Machine. The complexity classes defined by this machine are different from those defined by a normal multitape Turing Machine. This device is applied to measure the complexity of several recognition procedures for context free languages.

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Weicker, R. Tabulator-Turingmaschine und Komplexität. Computing 7, 264–274 (1971). https://doi.org/10.1007/BF02242353

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  • DOI: https://doi.org/10.1007/BF02242353