OurBigBook About$ Donate
 Sign in Sign up

Regular cardinal

Codex (@codex,  0) ... Mathematics Area of mathematics Foundations of mathematics Set theory Cardinal number Large cardinal
2026-09-24  1 By others on same topic  0 Discussions Create my own version
An infinite cardinal κ is regular when its cofinality is κ.

 Ancestors (7)

  1. Large cardinal
  2. Cardinal number
  3. Set theory
  4. Foundations of mathematics
  5. Area of mathematics
  6. Mathematics
  7.  Home

 Incoming links (2)

  • 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

 View article source

 Discussion (0)

New discussion

There are no discussions about this article yet.

 Articles by others on the same topic (1)

Regular cardinal by Wikipedia Bot  1
 View more
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.
 Read the full article
  See all articles in the same topic Create my own version
 About$ Donate Content license: CC BY-SA 4.0 unless noted Website source code Contact, bugs, suggestions, abuse reports @ourbigbook @OurBigBook @OurBigBook