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On projections of the tails of a power
Forum Mathematicum ( IF 0.8 ) Pub Date : 2024-04-03 , DOI: 10.1515/forum-2022-0375 Samuel M. Corson 1 , Saharon Shelah 2
Forum Mathematicum ( IF 0.8 ) Pub Date : 2024-04-03 , DOI: 10.1515/forum-2022-0375 Samuel M. Corson 1 , Saharon Shelah 2
Affiliation
Let 𝜅 be an inaccessible cardinal, 𝔘 a universal algebra, and ∼ \sim the equivalence relation on U κ \mathfrak{U}^{\kappa} of eventual equality. From mild assumptions on 𝜅, we give general constructions of E ∈ End ( U κ / ∼ ) \mathcal{E}\in\operatorname{End}(\mathfrak{U}^{\kappa}/{\sim}) satisfying E ∘ E = E \mathcal{E}\circ\mathcal{E}=\mathcal{E} which do not descend from Δ ∈ End ( U κ ) \Delta\in\operatorname{End}(\mathfrak{U}^{\kappa}) having small strong supports. As an application, there exists an E ∈ End ( Z κ / ∼ ) \mathcal{E}\in\operatorname{End}(\mathbb{Z}^{\kappa}/{\sim}) which does not come from a Δ ∈ End ( Z κ ) \Delta\in\operatorname{End}(\mathbb{Z}^{\kappa}) .
中文翻译:
关于权力尾巴的预测
设 𝜅 是一个不可接近的基数,𝔘 是一个通用代数,并且 ~ \sim 的等价关系 U κ \mathfrak{U}^{\kappa} 最终的平等。根据对 𝜅 的温和假设,我们给出了一般结构 乙 ε 结尾 ( U κ / ~ ) \mathcal{E}\in\operatorname{End}(\mathfrak{U}^{\kappa}/{\sim}) 满意的 乙 ∘ 乙 = 乙 \mathcal{E}\circ\mathcal{E}=\mathcal{E} 不属于 Δ ε 结尾 ( U κ ) \Delta\in\operatorname{End}(\mathfrak{U}^{\kappa}) 有小而有力的支撑。作为一个应用程序,存在一个 乙 ε 结尾 ( Z κ / ~ ) \mathcal{E}\in\operatorname{End}(\mathbb{Z}^{\kappa}/{\sim}) 这不是来自 Δ ε 结尾 ( Z κ ) \Delta\in\operatorname{End}(\mathbb{Z}^{\kappa}) 。
更新日期:2024-04-03
中文翻译:
关于权力尾巴的预测
设 𝜅 是一个不可接近的基数,𝔘 是一个通用代数,并且