Abstract
We consider language families defined by nondeterministic and deterministic log(n)-tape bounded auxiliary pushdown automata within polynomial time. It is known that these families are precisely the set of languages which are (many-one) log tape reducible to context-free languages and deterministic context-free languages, respectively. The results described here relate questions concerning these classes to other complexity classes and to questions concerning the tape complexity of context-free languages, resolution based proof procedures, solvable path systems, and deterministic context-free languages.
This work is supported in part by the National Science Foundation under grant GJ – 43228.
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Sudborough, I.H. (1977). Time and tape bounded auxiliary pushdown automata. In: Gruska, J. (eds) Mathematical Foundations of Computer Science 1977. MFCS 1977. Lecture Notes in Computer Science, vol 53. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-08353-7_172
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DOI: https://doi.org/10.1007/3-540-08353-7_172
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