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bn:00389852n
Noun Concept
Categories: Articles with short description, Descriptive set theory, Mathematical logic hierarchies
EN
projective hierarchy  projective set
EN
In the mathematical field of descriptive set theory, a subset A {\displaystyle A} of a Polish space X {\displaystyle X} is projective if it is Σ n 1 {\displaystyle {\boldsymbol {\Sigma }}_{n}^{1}} for some positive integer n {\displaystyle n}. Wikipedia
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EN
In the mathematical field of descriptive set theory, a subset A {\displaystyle A} of a Polish space X {\displaystyle X} is projective if it is Σ n 1 {\displaystyle {\boldsymbol {\Sigma }}_{n}^{1}} for some positive integer n {\displaystyle n}. Wikipedia
In descriptive set theory, a subset of a Polish space constructible by taking complements and projections of an analytic set Wikidata
IS A
subset
Wikipedia
EN
projective hierarchy
Wikidata
EN
projective set
Wikipedia Redirections
EN
projective set
Wikidata Alias
EN
projective hierarchy

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