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bn:03120858n
Noun Concept
Categories: Topology stubs, Topology, Descriptive set theory
EN
Fσ set  F-sigma  F-sigma set  F sigma  F sigma set
EN
In mathematics, an Fσ set is a countable union of closed sets. Wikipedia
Definitions
Relations
Sources
EN
In mathematics, an Fσ set is a countable union of closed sets. Wikipedia
Countable union of closed sets Wikidata
IS A
subset
countable set
PART OF
Borel hierarchy
DE
Gδ- und Fσ-Mengen
HAS KIND
closed set
OPPOSITE OF
Gδ set
STUDIED BY
topology
Wikipedia
EN
Fσ set
Wikidata
EN
Fσ set
Wikipedia Redirections
EN
F-sigma, F-sigma set, F sigma, F sigma set

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