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Happy Octonion Day
8/8/8
In mathematics, the octonions are a nonassociative extension of the quaternions. Their 8-dimensional normed division algebra over the real numbers is the widest possible that can be obtained from the Cayley-Dickson construction. The octonion algebra is often denoted O.
Possibly because they don't offer an associative multiplication, the octonions receive at times less attention than the quaternions. Despite this lack of popularity, they are related to a number of exceptional structures in mathematics, among them the exceptional Lie groups. Additionally, octonions have applications in fields such as string theory, special relativity, and quantum logic.
http://en.wikipedia.org/wiki/Octonion
suggested reading:
Why Beauty Is Truth: A History of Symmetry by Ian Stewart
The Eight by Katherine Neville
"...the octonions are the crazy old uncle nobody lets out of the attic..." -- John Baez
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