Results 1 to 10 of about 29 (29)

On $\omega $ -Strongly Measurable Cardinals

open access: yesForum of Mathematics, Sigma, 2023
We prove several consistency results concerning the notion of $\omega $ -strongly measurable cardinal in $\operatorname {\mathrm {HOD}}$ .
Omer Ben-Neria, Yair Hayut
doaj   +1 more source

$\mathbf {\Sigma }_1$ -definability at higher cardinals: Thin sets, almost disjoint families and long well-orders

open access: yesForum of Mathematics, Sigma, 2023
Given an uncountable cardinal $\kappa $ , we consider the question of whether subsets of the power set of $\kappa $ that are usually constructed with the help of the axiom of choice are definable by $\Sigma _1$ -formulas that only use ...
Philipp Lücke, Sandra Müller
doaj   +1 more source

Hjorth’s Reflection Argument

open access: yesForum of Mathematics, Sigma
In [7], Hjorth, assuming $\mathsf {{AD+ZF+DC}}$ , showed that there is no sequence of length $\omega _2$ consisting of distinct $\boldsymbol {\Sigma }^1_2$ -sets. We show that the same theory implies that for $n\geq 0$ , there is
Grigor Sargsyan
doaj   +1 more source

Applications of the Magidor iteration to ultrafilter theory

open access: yesForum of Mathematics, Sigma
We characterize sums of normal ultrafilters after the Magidor iteration of Prikry forcings over a discrete set of measurable cardinals. We apply this to show that the weak Ultrapower Axiom is not equivalent to the Ultrapower Axiom.
Tom Benhamou, Gabriel Goldberg
doaj   +1 more source

$\textsf {AD}^{+}$ implies $ \omega _{1}$ is a club $ \Theta $ -Berkeley cardinal

open access: yesForum of Mathematics, Sigma
Following [1], given cardinals $\kappa
Douglas Blue, Grigor Sargsyan
doaj   +1 more source

Singular cardinals and strong extenders

open access: yesOpen Mathematics, 2013
Apter Arthur   +2 more
doaj   +1 more source

Determinants of Digital Health Literacy: International Cross-Sectional Study. [PDF]

open access: yesJ Med Internet Res
Qiu CS   +9 more
europepmc   +1 more source
Some of the next articles are maybe not open access.

Supercompactness Can Be Equiconsistent with Measurability

Notre Dame Journal of Formal Logic, 2021
Nam Trang
exaly  

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