拉姆齐选择原则对 ZF$\mathsf {ZF}$ 的影响

IF 0.4 4区 数学 Q4 LOGIC Mathematical Logic Quarterly Pub Date : 2024-07-06 DOI:10.1002/malq.202300024
Lorenz Halbeisen, Riccardo Plati, Saharon Shelah
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引用次数: 0

摘要

元素集合族的拉姆齐选择原理(表示为 )指出,每个无限集合都有一个无限子集,其上有一个选择函数.我们将研究哪些正整数的蕴涵可以在 .中证明,除了三元蕴涵之外,在每个奇整数都是三个素数之和(称为三元哥德巴赫猜想)的假设下,唯一可以在 .中证明的非三元蕴涵是 .。
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Implications of Ramsey Choice principles in ZF $\mathsf {ZF}$

The Ramsey Choice principle for families of n $n$ -element sets, denoted RC n $\operatorname{RC}_{n}$ , states that every infinite set X $X$ has an infinite subset Y X $Y\subseteq X$ with a choice function on [ Y ] n : = { z Y : | z | = n } $[Y]^n:= \lbrace z\subseteq Y: |z| = n\rbrace$ . We investigate for which positive integers m $m$ and n $n$ the implication RC m RC n $\operatorname{RC}_{m} \implies \operatorname{RC}_{n}$ is provable in  ZF $\mathsf {ZF}$ . It will turn out that beside the trivial implications RC m RC m $\operatorname{RC}_{m} \implies \operatorname{RC}_{m}$ , under the assumption that every odd integer n > 5 $n&gt;5$ is the sum of three primes (known as ternary Goldbach conjecture), the only non-trivial implication which is provable in ZF $\mathsf {ZF}$ is RC 2 RC 4 $\operatorname{RC}_{2} \implies \operatorname{RC}_{4}$ .

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来源期刊
CiteScore
0.60
自引率
0.00%
发文量
49
审稿时长
>12 weeks
期刊介绍: Mathematical Logic Quarterly publishes original contributions on mathematical logic and foundations of mathematics and related areas, such as general logic, model theory, recursion theory, set theory, proof theory and constructive mathematics, algebraic logic, nonstandard models, and logical aspects of theoretical computer science.
期刊最新文献
Effectiveness of Walker's cancellation theorem Editorial correction for L. Halbeisen, R. Plati, and Saharon Shelah, “Implications of Ramsey Choice principles in ZF$\mathsf {ZF}$”, https://doi.org/10.1002/malq.202300024 Good points for scales (and more) Wadge degrees of Δ20$\mathbf{\Delta }^0_2$ omega‐powers Issue Information
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