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- Gδ_set abstract "In the mathematical field of topology, a Gδ set is a subset of a topological space that is a countable intersection of open sets. The notation originated in Germany with G for Gebiet (German: area, or neighborhood) meaning open set in this case and δ for Durchschnitt (German: intersection). The term inner limiting set is also used. Gδ sets, and their dual Fσ sets, are the second level of the Borel hierarchy.".
- Gδ_set wikiPageID "252076".
- Gδ_set wikiPageRevisionID "605684432".
- Gδ_set subject Category:Descriptive_set_theory.
- Gδ_set subject Category:General_topology.
- Gδ_set comment "In the mathematical field of topology, a Gδ set is a subset of a topological space that is a countable intersection of open sets. The notation originated in Germany with G for Gebiet (German: area, or neighborhood) meaning open set in this case and δ for Durchschnitt (German: intersection). The term inner limiting set is also used. Gδ sets, and their dual Fσ sets, are the second level of the Borel hierarchy.".
- Gδ_set label "Gδ set".
- Gδ_set label "Gδ集合".
- Gδ_set label "Zbiór typu G-delta".
- Gδ_set sameAs G%CE%B4_set.
- Gδ_set sameAs Gδ集合.
- Gδ_set sameAs Zbiór_typu_G-delta.
- Gδ_set sameAs Q127244.
- Gδ_set sameAs Q127244.
- Gδ_set wasDerivedFrom Gδ_set?oldid=605684432.