Consistency, optimality, and incompleteness
Consistency, optimality, and incompleteness
复制标题
一致性、最优性和不完整性
DOI:
10.1016/j.apal.2013.06.009
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发表时间:
2013-12
影响因子:
0.8
通讯作者:
Moritz Mueller
中科院分区:
文献类型:
--
作者:
Yijia Chen;Joerg Flum;Moritz Mueller
Assume that the problem P 0 is not solvable in polynomial time. Let T be a first-order theory containing a sufficiently rich part of true arithmetic. We characterize T∪{Con T} as the minimal extension of T proving for some algorithm that it decides P 0 as fast as any algorithm B with the property that T proves that B decides P 0. Here, Con T claims the consistency of T. As a byproduct, we obtain a version of Gödelʼs Second Incompleteness Theorem. Moreover, we characterize problems with an optimal algorithm in terms of arithmetical theories.
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