BabelNet

bn:00389852n

Noun Concept

conjunto projetiva hierarquia projetiva

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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subconjunto

Wikipedia Translations

conjunto projetiva, hierarquia projetiva