Interpreting the projective hierarchy in expansions of the real line

Interpreting the projective hierarchy in expansions of the real line
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解释实线扩展中的射影层次

DOI:
10.1090/s0002-9939-2014-12023-5
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发表时间:
2012
期刊:
IEEE Trans. Computers
影响因子:
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通讯作者:
Michael A. Tychonievich
Michael A. Tychonievich
中科院分区:
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文献类型:
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作者:
Philipp Hieronymi;Michael A. Tychonievich

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给出了真实的数序集的展开式在半代数注入下定义(R,+,·,N)的象的一个判据.特别地,我们证明了对于非二次无理数α,真实的数的有序Q(α)-向量空间的N展开定义了R上的乘法.
We give a criterion when an expansion of the ordered set of real numbers defines the image of (R,+, ·,N) under a semialgebraic injection. In particular, we show that for a non-quadratic irrational number α, the expansion of the ordered Q(α)-vector space of real numbers by N defines multiplication on R.