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Adjoining a Strong Unit to an Archimedean Lattice-Ordered Group
Order ( IF 0.4 ) Pub Date : 2021-03-20 , DOI: 10.1007/s11083-021-09556-5
Anthony W. Hager , Philip Scowcroft

Within archimedean -groups, “GSW” means there are H with strong unit (HW) and an embedding GH. A. Theorem (6.1). For X a Tychonoff space (or completely regular locale), C(X) ∈ SW iff X is pseudocompact (which means C(X) ∈ W). But any GSW embeds into various C(X), and any C(X) contains many HW. We define cardinal invariants \(\mathfrak {b}G\), \(\mathfrak {d}G\), λG which generalize respectively, the bounding and dominating numbers for \(\mathbb {R}^{\mathbb {N}}\), \(\mathfrak {b}\) and \(\mathfrak {d}\), and the π-weight of a topological space. B. Theorem (6.3, 7.5). SupposeGC(X), and X contains densely \(\bigcup _{I} X_{i}\), the Xi compact. Then GSW if either (|I| = ω and \(\mathfrak {d}G < \mathfrak {b}\)) or (\(|I| < \mathfrak {b}\) and \(\mathfrak {d}G = \omega \)). This “\(\omega , \mathfrak {b}\) symmetry” fades a bit in the following, where \(\mathfrak {p}\) is the pseudo-intersection number for \(\mathbb {R}^{\mathbb {N}}\) (\(\mathfrak {p} \le \mathfrak {b}\), with = under Martin’s Axiom). C. Theorem (8.2). GSW if either \((\mathfrak {d}G = \omega \) and \(\lambda G < \mathfrak {b}\)) or (\(\mathfrak {d}G < \mathfrak {p}\) andλG = ω). Examples (§9) show limits on the hypotheses in B and C.



中文翻译:

将一个强大的部队与一个阿基米德格子定律团体联系在一起

内阿基米德 -基团,“ G ^小号W¯¯ * ”的意思有ħ具有很强的单元(ħw ^ *)和一个嵌入ģħA.定理(6.1) 对于 X 一吉洪诺夫空间(或完全正区域)ÇX)∈小号W¯¯ * 当且仅当 X 是pseudocompact(这意味着 ÇX)∈ w ^ *)。但是,任何小号w ^ *嵌入到各种ÇX),以及任何ÇX)含有许多ħw ^ *。我们定义基数不变量\(\ mathfrak {B} g ^ \) \(\ mathfrak {d} g ^ \) λ ģ分别一概而论,边界和用于控制数\(\ mathbb {R} ^ {\ mathbb { N}} \)\(\ mathfrak {b} \)\(\ mathfrak {d} \)以及拓扑空间的π权重。B.定理(6.3,7.5) 假设ģÇX),并且 X 包含密集的 \(\ bigcup _ {I} X_ {i} \) X i 压缩然后 ģ小号W¯¯ * 如果任一(|| = ω \(\ mathfrak {d} g ^ <\ mathfrak {B} \) \(| I | <\ mathfrak {B} \) \( \ mathfrak {d} G = \ omega \))。这种“ \(\ omega,\ mathfrak {b} \)对称性”在下面逐渐淡出,其中\(\ mathfrak {p} \)\(\ mathbb {R} ^ {\ mathbb {N}} \)\(\ mathfrak {p} \ le \ mathfrak {b} \),在Martin's Axiom下带有=)。C.定理(8.2) ģ小号W¯¯ * 如果任 \((\ mathfrak {d} G = \欧米加\) \(\拉姆达ģ<\ mathfrak {B} \) \(\ mathfrak {d} g ^ <\ mathfrak { p} \) λ ģ = ω)。示例(第9节)显示了B和C中假设的限制。

更新日期:2021-03-21
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