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A Note on Synchronized Alternating Turing Machines with Small Space Bounds
Katsushi INOUE Itsuo TAKANAMI Akira ITO Hiroshi MATSUNO
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/11/25
Print ISSN: 0000-0000
Type of Manuscript: LETTER
Category: Automation, Language and Theory of Computing
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We solve open problems about synchronized alternating Turing machines. For example, we show that for any L(n)o(log n), there is a set accepted by a loglog n space bounded two-way synchronized alternating Turing machine with only universal states, but not accepted by any L(n) space bounded one-way synchronized Turing machine with only universal states.