The method of forced enumeration for nondeterministic automata
- 253 Downloads
Every family of languages, recognized by nondeterministic L(n) tape-bounded Turing machines, where L(n)≥logn, is closed under complement. As a special case, the family of context-sensitive languages is closed under complement. This solves the open problem from .
KeywordsInformation System Operating System Data Structure Communication Network Information Theory
Unable to display preview. Download preview PDF.
- 1.Hopcroft, J.E., Ullman, J.D.: Formal languages and their relation to automata. Reading: Addison-Wesley 1969Google Scholar
- 2.Immerman, N.: Nondeterministic space is closed under complementation. Proceedings of the 3rd Annual Conference Structure in Complexity Theory, 14–17 June 1988, Washington D.C. (also TH Report YALEU/DCS/TR 552, July 1987)Google Scholar
- 3.Immerman, N.: Descriptive and computational complexity, (unpublished manuscript, 1987)Google Scholar
- 4.Kuroda, S.Y.: Classes of languages and linear-bounded automata. Inf. Control 7, 207–233 (1964)Google Scholar
- 5.Szelepcsényi, R.: Context-sensitive languages are closed under complementation, TR Komensky University, April 1987 (in Slovak)Google Scholar
- 6.Szelepcsényi, R.: The method of Forcing for nondeterministic automata. Bull. Eur. Assoc. Theor. Comp. Sci. 33, 96–100 (1987)Google Scholar