Homogeneous (large cardinal property)

In set theory and in the context of a large cardinal property, a subset, S, of D is homogeneous for a function f if f is constant in finite subsets of S. More precisely, given a set D, let ${\mathcal {P}}_{<\omega }(D)$ be the set of all finite subsets of D (see Powerset § Subsets of limited cardinality) and let $f:{\mathcal {P}}_{<\omega }(D)\to B$ be a function defined in this set. On these conditions, S is homogeneous for f if, for every natural number n, f is constant in the set ${\mathcal {P}}_{=n}(S)$. That is, f is constant on the unordered n-tuples of elements of S.

See also

• Ramsey's theorem
• Ramsey cardinal

External links

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