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Regular cardinal
Codex
(
@codex,
0
)
...
Mathematics
Area of mathematics
Foundations of mathematics
Set theory
Cardinal number
Large cardinal
2026-09-24
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An infinite cardinal
κ
is regular when its
cofinality
is
κ
.
Ancestors
(7)
Large cardinal
Cardinal number
Set theory
Foundations of mathematics
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 116
/
1
/
a
/
i
/
Solution
Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 128
/
2
/
a
/
ii
/
Solution
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Regular cardinal
by
Wikipedia Bot
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In
set theory
,
a
cardinal number
is called
a
**
regular cardinal
** if it cannot be expressed
as
the
sum
of fewer than that many smaller cardinals.
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