序數算術

加法

0 < 1 < 2 < 3 < ... < 0' < 1' < 2' < ...

3 + ω 就像

0 < 1 < 2 < 0' < 1' < 2' < ...

0 < 1 < 2 < 3 < ... < 0' < 1' < 2'

乘法

00 < 10 < 20 < 30 < ... < 01 < 11 < 21 < 31 < ...

00 < 10 < 01 < 11 < 02 < 12 < 03 < 13 < ...

引用

• Jech, Thomas, 2003. Set Theory: The Third Millennium Edition, Revised and Expanded. Springer. ISBN 3-540-44085-2.
• Kunen, Kenneth, 1980. Set Theory: An Introduction to Independence Proofs. Elsevier. ISBN 0-444-86839-9.