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Issue No. 04 - April (1971 vol. 20)
ISSN: 0018-9340
pp: 474-475
B.H. Barnes , Dep. Comput. Sci. Pennsylvania State Univ.
This correspondence presents an example of a two-way automaton which has significantly fewer states than any one-way automaton accepting the same set of tapes. Thus, in this particular case, memory space can be saved by using a two-way automaton. This savings in space, however, is accompanied by an increase in recognition time.
Finite automaton, one-way automaton, regular sets, two-way automaton.

B. Barnes, "A Two-Way Automaton with Fewer States than Any Equivalent One-Way Automaton," in IEEE Transactions on Computers, vol. 20, no. , pp. 474-475, 1971.
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