最終更新日：2024/08/02

(mathematics) An ultrafilter such that every set belonging to it is the superset of some fixed singleton set.

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principal ultrafilter

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principal ultrafilter

noun

(mathematics) An ultrafilter such that every set belonging to it is the superset of some fixed singleton set.

The principal ultrafilter is used in mathematical analysis.

意味（1）

(mathematics) An ultrafilter such that every set belonging to it is the superset of some fixed singleton set.