Nonstandard arithmetic and recursive comprehension
Nonstandard arithmetic and recursive comprehension
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非标准算术和递归理解
DOI:
10.1016/j.apal.2010.01.001
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发表时间:
2010
期刊:
影响因子:
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通讯作者:
H. Keisler
中科院分区:
文献类型:
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作者:
H. Keisler
First order reasoning about hyperintegers can prove things about sets of integers. In the author’s paper Nonstandard Arithmetic and Reverse Mathematics, Bulletin of Symbolic Logic 12 (2006) 100–125, it was shown that each of the “big five” theories in reverse mathematics, including the base theory RCA0, has a natural nonstandard counterpart. But the counterpart∗RCA0of RCA0has a defect: it does not imply the Standard Part Principle that a set exists if and only if it is coded by a hyperinteger. In this paper we find another nonstandard counterpart, [Formula: see text] , that does imply the Standard Part Principle.
DOI:
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发表时间:
2007
期刊:
影响因子:
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作者:
Nobuyuki Sakamoto;Keita Yokoyama;Keita Yokoyama;横山 啓太;横山 啓太;横山 啓太
通讯作者:
横山 啓太