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Related papers: Woodin for strong compactness cardinals

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We continue the work from [8] and make a small -- but significant -- improvement to the definition of $j$-decomposable system. This provides us with a better lifting of elementary embeddings to symmetric extensions. In particular, this…

Logic · Mathematics 2026-04-21 Yair Hayut , Asaf Karagila

We prove that large cardinals need not generally exhibit their large cardinal nature in HOD. For example, a supercompact cardinal $\kappa$ need not be weakly compact in HOD, and there can be a proper class of supercompact cardinals in $V$,…

Logic · Mathematics 2020-12-22 Yong Cheng , Sy-David Friedman , Joel David Hamkins

We prove that $\alpha_M(\lambda)$ can be successor of a supercompact cardinal, when $\lambda$ is a Magidor cardinal. From this result we obtain the consistency of $\alpha_M(\lambda)$ being a successor of a singular cardinal with uncountable…

Logic · Mathematics 2019-05-17 Shimon Garti , Yair Hayut

The main result of this paper shows that a weak form of Tower Sealing holds in a generic extension of hod mice with a strong cardinal and a proper class of Woodin cardinals. We show Tower Sealing fails in such extensions in general. We show…

Logic · Mathematics 2025-12-09 Grigor Sargsyan , Nam Trang

We give an exposition of the compactness of $L(Q^\mathrm{cf})$, for any set $C$ of regular cardinals.

Logic · Mathematics 2020-09-11 Enrique Casanovas , Martin Ziegler

We give a direct proof of an important result of Solynin which says that the Poincar\'e metric is a strongly submultiplicative domain function. This result is then used to define a new capacity for compact subsets of the complex plane…

Complex Variables · Mathematics 2016-03-23 Daniela Kraus , Oliver Roth

The technique of $\star$-translation is important in arguments calibrating the strengths of determinacy theories against large cardinals, for example in [9] and [1] in the paper's bibliography. It has also been used in analysing the…

Logic · Mathematics 2026-02-10 Farmer Schlutzenberg

We introduce the class of unshreddable theories, which contains the simple and NIP theories, and prove that such theories have exactly saturated models in singular cardinals, satisfying certain set-theoretic hypotheses. We also give…

Logic · Mathematics 2021-04-19 Itay Kaplan , Nicholas Ramsey , Saharon Shelah

Recently the second author introduced combinatorial principles that characterize supercompactness for inaccessible cardinals but can also hold true for small cardinals. We prove that the proper forcing axiom PFA implies these principles…

Logic · Mathematics 2010-12-10 Matteo Viale , Christoph Weiß

We prove some refinements of concentration compactness principle for Sobolev space $W^{1,n}$ on a smooth compact Riemannian manifold of dimension $n$. As an application, we extend Aubin's theorem for functions on $\mathbb{S}^{n}$ with zero…

Classical Analysis and ODEs · Mathematics 2020-09-08 Fengbo Hang

The inner model problem for supercompact cardinals, one of the central open problems in modern set theory, asks whether there is a canonical model of set theory with a supercompact cardinal. The problem is closely related to the more…

Logic · Mathematics 2020-06-08 Gabriel Goldberg

We succeed to say something on the identities of (mu^+, mu) when mu>theta>cf(mu), mu strong limit theta--compact. This hopefully will help to prove the consistency of ``some pair (mu^+,mu) is not compact'', however, this has not been…

Logic · Mathematics 2007-05-23 Saharon Shelah

We recently formulated a new large-cardinal axiom of strength intermediate between a totally indescribable cardinal and an $\omega$-Erd\H{o}s cardinal, positing the existence of what we called an "extremely reflective cardinal", and we…

Logic · Mathematics 2020-10-23 Rupert McCallum

We establish the consistency of the failure of the diamond principle on a cardinal $\kappa$ which satisfies a strong simultaneous reflection property. The result is based on an analysis of Radin forcing, and further leads to a…

Logic · Mathematics 2017-06-06 Omer Ben-Neria

We give an arithmetic proof of rigidity for postcritically finite polynomials.

Dynamical Systems · Mathematics 2014-02-26 Adam Epstein

We show that the notions of "strongly unfoldable cardinals", introduced by Villaveces in his model-theoretic studies of models of set theory, and "shrewd cardinals", introduced by Rathjen in a proof-theoretic context, coincide. We then…

Logic · Mathematics 2021-12-08 Philipp Lücke

We put together Woodin's $\Sigma^2_1$ basis theorem of AD$^+$ and Vop\v{e}nka's theorem to conclude the following: If there is a proper class of Woodin cardinals, then every $(\Sigma^2_1)^{\mbox{uB}}$ statement that is true in $V$ is true…

Logic · Mathematics 2025-05-12 Gabriel Goldberg , Dan Hathaway

Strongly bounded groups are those groups for which every action by isometries on a metric space has orbits of finite diameter. Many groups have been shown to have this property, and all the known infinite examples so far have cardinality at…

Group Theory · Mathematics 2020-10-07 Samuel M. Corson , Saharon Shelah

This paper is devoted to the study of Sidon sets, $\Lambda(p)$-sets and some related notions for compact quantum groups. We establish several different characterizations of Sidon sets, and in particular prove that any Sidon set in a…

Operator Algebras · Mathematics 2017-05-16 Simeng Wang

We analyze a natural function definable from a scale at a singular cardinal, and using this function we are able to obtain quite strong negative square-brackets partition relations at successors of singular cardinals. The proof of our main…

Logic · Mathematics 2008-06-02 Todd Eisworth
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