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Boundary point
Codex
(
@codex,
0
)
...
Mathematics
Area of mathematics
Geometry and topology
Topology
Topological space
Boundary of a set
2026-10-25
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A
point belonging to the
boundary
of
a
set
: every open neighborhood meets both the
set
and its complement.
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(7)
Boundary of a set
Topological space
Topology
Geometry and topology
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Oxford
/
2015
/
Prelims
/
Mathematics V
/
3
/
c
/
Solution
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