(Set Theory)


Set Theory
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What is Pseudo-intersection?

In mathematical set theory, a pseudo-intersection of a family of sets is an infinite set S such that each element of the family contains all but a finite number of elements of S. The pseudo-intersection number, sometimes denoted by the fraktur letter 𝔭, is the smallest size of a family of infinite subsets of the natural numbers that has the strong finite intersection property but has no pseudo-intersection.

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set theory


Pseudo intersection numberPseudo-intersection number


Pseudosnitt (sv)

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