ATD passim, quaternions

[Carvill John]

Hey, thanks for that, I really enjoyed that Baez article, and even 
understood some of it!

"And here there dawned on me the notion that we must admit, in some sense, a 
fourth dimension of space for the purpose of calculating with triples ... An 
electric circuit seemed to close, and a spark flashed forth."

Very Pynchon description, n'est pas?

Right, now I *really* need some breakfast, before I attempt that 4th 
dimension........


>Quaternions, explained by John Baez (yes, the cousin of Richard
>Farina's sister-in-law):
>
>http://pass.maths.org.uk/issue32/features/baez/
>
>(also http://plus.maths.org/issue33/features/baez/index.html on the 
>octonions)
>
>At a higher level, we have this by his colleague David Corfield:
>
>http://www.dcorfield.pwp.blueyonder.co.uk/2006/03/history-of-quaternions.html
>
>-A. A.

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