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# Do strange numbers explain reality?

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Some think that the properties of our universe are based on strange numbers which have eight dimensions, called octonions:

An Irish mathematician by the name of William Rowan Hamilton discovered in 1843 that if you pair the complex numbers in a certain way, they can form 4-D “quaternions.” He was apparently so excited about figuring out that formula, that he immediately carved it into the Broome Bridge in Dublin. Not to be outdone, John Graves, a friend of Hamilton’s who was a lawyer and math whiz, showed that quarternions can be paired up to become “octonions” – numbers that can assume coordinates in an abstract 8-dimensional (8-D) space.

The mystery of these numbers has led to speculation among researchers that they have a special purpose and can eventually explain the deeper secrets of the universe. In an email interview with Quanta Magazine, the particle physicist Pierre Ramond from the University of Florida explained that “Octonions are to physics what the Sirens were to Ulysses.” Paul Ratner, “Physicists puzzled by strange numbers that could explain reality” at BigThink

Well, if all that New Year’s partying out there is keeping you awake, here is more on octonions.

See also these odd number facts: New Scientist on the glitch at the edge of the universe (the saga of the strange number 137)

and

Prime numbers are not nearly as scattershot as previously thought

Should I add, vectors all the way down?kairosfocus
January 5, 2019
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Nice explanation, math guy.hazel
January 2, 2019
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Regarding the nifty graphic.... The reals live inside the complex numbers live inside the quaternions live inside the octonions. But structure is lost while progressing up this chain. The complex numbers lack the total ordering of the reals. The quaternions lack the commutative multiplication of the complex numbers (and reals). The octonion multiplication is not commutative or even associative. (And it has been proven that there is no distributive multiplication for 16-tuples, so octonions is as far as the chain goes.)math guy
January 2, 2019
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Wait, isn't "octonion" just the German word for "onion"? :)ET
January 2, 2019
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