On sets of relations definable by addition
On sets of relations definable by addition
复制标题
关于可通过加法定义的关系集
DOI:
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发表时间:
1982
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影响因子:
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通讯作者:
J. Lynch
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文献类型:
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作者:
J. Lynch
Abstract For every κ ∈ ω, there is an infinite set Aκ ⊆ ω and a d(κ) ∈ ω such that for all Q0, Q1, ⊆ Aκ where ∣Q0∣ = ∣ Q1∣, or d(κ) < ∣Q0∣, Q1∣ < ℵ0, the structures ‹ω, +, Q0› and ‹ω, +, Q1› are indistinguishable by first-order sentences of quantifier depth κ whose atomic formulas are of the form u = v, u + v = w, and Q(u), where u, v, and w are variables.