K+1 heads are better than K:

There are languages which can be recognized by a deterministic (k+1)-headed one-way finite automaton but which cannot be recognized by a k-headed one-way (deterministic or non-deterministic) finite automaton. Furthermore, there is a language accepted by a k-headed nondeterministic finite automaton w...

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Bibliographic Details
Main Authors: Yao, Andrew C. (Author), Rivest, Ronald L. (Author)
Format: Book
Language:English
Published: Cambridge, Mass. Massachusetts Inst. of Technology, Lab. for Computer Science 1976
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Summary:There are languages which can be recognized by a deterministic (k+1)-headed one-way finite automaton but which cannot be recognized by a k-headed one-way (deterministic or non-deterministic) finite automaton. Furthermore, there is a language accepted by a k-headed nondeterministic finite automaton which is accepted by no k-headed deterministic finite automaton. (Author).
Physical Description:8 S.

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