Omega
From AoPSWiki
Omega (
) is the last letter of the Greek alphabet. In ring theory, omega is a constant the represents 
.
Omega ring
- Main article: Omega ring
The omega ring is the ring containing 
. It has the interesting property that whenever one item in the ring is taken to any power, another item in the ring is the result.
Other uses
- Omega is also used to express Aleph null.
