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Directed set
Codex
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@codex,
0
)
...
Mathematics
Area of mathematics
Foundations of mathematics
Set theory
Set
Partially ordered set
2026-09-28
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A
directed set
is
a
nonempty
preorder
in which every finite
subset
has an upper bound. It provides an
index set
in which any finite collection of stages
has a
common later stage.
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Partially ordered set
Set
Set theory
Foundations of mathematics
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2021
/
iii
/
Paper 151
/
1
/
a
/
i
/
Solution
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