Technical Report CS0056

TR#:CS0056
Class:CS
Title: Complexity of w-Computations On Oeterministic Pushdown Machines
Authors: Rina S.Cohen and Arie Y.Gold
PDFCS0056.pdf
Abstract: Deterministic pushdown machines working on w-tapes are considered. The w-languages recognized by such machines are called w-DCFL's. Various recognition mechanisms for w-sequences are considered, yielding a hierarchy of "i-recognizable" classes of w-DCFL's. i-recognizability of an w-language can be considered a measure of the complexity of the w-language. These "i-recognizable" classes are extensively studied and related to other classes of W-CFL's. Decision problems concerning these classes are investigated; in particular, for some of the classes the membership problem is shown to be decidable.
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