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arXiv 1005.2636math.LOcs.FL
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图上的图灵机与不可避免群

Turing Machines on Graphs and Inescapable Groups

Aubrey da Cunha

摘要:

我们提出了一个概括的标准图灵机的基础上,允许不寻常的磁带。我们提出了一套合理的磁带几何形状的限制,并对所有磁带符合这些限制。令人惊讶的是,这种推广并没有导致可计算函数概念的另一个等价表述。相反,它给出了一个不依赖于预言机的递归可重复图灵度的替代定义。的定义引起了一些问题的可计算路径内的凯莱图的有限生成群,其中几个问题的答案。

英文摘要:

We present a generalization of standard Turing machines based on allowing unusual tapes. We present a set of reasonable constraints on tape geometry and classify all tapes conforming to these constraints. Surprisingly, this generalization does not lead to yet another equivalent formulation of the notion of computable function. Rather, it gives an alternative definition of the recursively enumerable Turing degrees that does not rely on oracles. The definitions give rise to a number of questions about computable paths inside Cayley graphs of finitely generated groups, and several of these questions are answered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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