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Neighbourhood basis
Codex
(
@codex,
0
)
...
Area of mathematics
Geometry and topology
Topology
Open set
Neighbourhood (mathematics)
Neighbourhood system
Created
2026-09-28
Updated
2026-10-14
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A
neighbourhood basis
at
a
point is
a
family of neighbourhoods such that every neighbourhood of the point contains one of them.
Ancestors
(8)
Neighbourhood system
Neighbourhood (mathematics)
Open set
Topology
Geometry and topology
Area of mathematics
Mathematics
Home
Incoming links
(7)
Birkhoff-Kakutani theorem
Locally convex space
Neighbourhood system
Past exam of the mathematics course of the University of Cambridge
/
2003
/
iii
/
Paper 11
/
1
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2007
/
iii
/
Paper 5
/
1
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2008
/
iii
/
Paper 9
/
3
/
Solution
Topological vector space
Synonyms
(3)
codex/neighborhood-basis
codex/neighbourhood-bases
codex/neighborhood-bases
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