Higher dimensional chain conditions

We investigate higher dimensional chain conditions, where the largeness notion is given by Fubini products of a given ideal. From strong saturation properties of an ideal, we derive abstractly versions of higher dimensional [Formula: see text]-system lemma, which imply many posets, including any finite support iteration of [Formula: see text]-centered posets and measure algebras, satisfy the higher dimensional chain conditions. We then show that if a poset satisfies a strengthening of the [Formula: see text]-finite chain condition by Horn and Tarski, then it satisfies higher dimensional chain conditions. As an application, we derive Ramsey-theoretic consequences, namely various partition hypotheses as studied by Bannister, Bergfalk, Moore and Todorcevic, from the existence of ideals satisfying strong chain conditions.

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Publication Details

Journal
Journal of Mathematical Logic
Published
2024-10-25
DOI
https://doi.org/10.1142/s0219061324500326
Primary Topic
Polynomial and algebraic computation
Type
article
Field-Weighted Citation Impact
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article

Higher dimensional chain conditions

Stevo Todorčević, Jing Zhang
Journal of Mathematical Logic
Polynomial and algebraic computation
article

Higher dimensional chain conditions

Stevo Todorčević, Jing Zhang
article en

Abstract

We investigate higher dimensional chain conditions, where the largeness notion is given by Fubini products of a given ideal. From strong saturation properties of an ideal, we derive abstractly versions of higher dimensional [Formula: see text]-system lemma, which imply many posets, including any finite support iteration of [Formula: see text]-centered posets and measure algebras, satisfy the higher dimensional chain conditions. We then show that if a poset satisfies a strengthening of the [Formula: see text]-finite chain condition by Horn and Tarski, then it satisfies higher dimensional chain conditions. As an application, we derive Ramsey-theoretic consequences, namely various partition hypotheses as studied by Bannister, Bergfalk, Moore and Todorcevic, from the existence of ideals satisfying strong chain conditions.

Journal of Mathematical Logic
Centre National de la Recherche Scientifique (FR), University of Toronto (CA), Institut de Mathématiques de Jussieu-Paris Rive Gauche (FR), Institut za savremenu istoriju (RS), Mathematical Institute of the Serbian Academy of Sciences and Arts
Openalex Percentile: Top 78%
Polynomial and algebraic computation
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