In mathematics, a Ramsey cardinal is a certain kind of large cardinal number introduced by Erdős & Hajnal (1962) and named after Frank P. Ramsey, whose theorem, called Ramsey's theorem establishes that ω enjoys a certain property that Ramsey cardinals generalize to the uncountable case. Let [κ]<ω denote the set of all finite subsets of κ.
In mathematics, a Ramsey cardinal is a certain kind of large cardinal number introduced by Erdős & Hajnal (1962) and named after Frank P. Ramsey, whose theorem, called Ramsey's theorem establishes that ω enjoys a certain property that Ramsey cardinals generalize to the uncountable case. Let [κ]<ω denote the set of all finite subsets of κ.
Source: Wikipedia "Ramsey cardinal" · CC BY-SA 4.0
Share this article: X · Bluesky