HYPERMACHINES
HYPERMACHINES
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DOI:
10.2178/jsl/1305810767
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发表时间:
2011-06-01
影响因子:
0.6
通讯作者:
Welch, P. D.
中科院分区:
文献类型:
--
作者:
Friedman, Sy-David;Welch, P. D.
The Infinite Time Turing Machine model [8] of Hamkins and Kidder is, in an essential sense, a "Sigma(2)-machine" in that it uses a Sigma(2) Liminf Rule to determine cell values at limit stages of time. We give a generalisation of these machines with an appropriate Sigma(n) rule. Such machines either halt or enter an infinite loop by stage zeta(n) =(df) mu zeta(n)[there exists Sigma(n) > zeta (n) L-zeta(n)