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arXiv 2003.10328math.DScs.FL
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A Physically Universal Turing Machine

Ville Salo, Ilkka Törmä

英文摘要:

We construct a two-dimensional Turing machine that is physically universal in both the moving tape and moving head model. In particular, it is mixing of all finite orders in both models. We also provide a variant that is physically universal in the moving tape model, but not in the moving head model.

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