Alternating multicounter machines with constant number of reversals (Q1067412)
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scientific article; zbMATH DE number 3928352
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Alternating multicounter machines with constant number of reversals |
scientific article; zbMATH DE number 3928352 |
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Alternating multicounter machines with constant number of reversals (English)
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1985
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The alternating multicounter machines with constant number of reversals are investigated in relation to Turing machines. It is shown that two-way and one-way versions of these machines working in polynomial time define precisely the class P of languages recognized by Turing machines in deterministic polynomial time. Further, it is proved that one-way alternating 4-counter machines with one reversal allowed for each counter are as powerful as Turing machines.
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alternation
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multihead automata
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Turing machines
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polynomial time
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