# extension of complex numbers n

You can introduce the imaginary unit , then you can introduce the quaternions. Now somebody has introduced n-imaginary units for sure, what is the term.

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Look up octonions and sedenions. –  Ｊ. Ｍ. Oct 31 '11 at 19:02
en.wikipedia.org/wiki/Biquaternion –  Graphth Oct 31 '11 at 19:02
Please don't "sign" your messages. Your signature already appears in the bottom right of every post you make. –  Arturo Magidin Oct 31 '11 at 19:13
You might also be interested in reading about Clifford algebras. –  Hans Lundmark Oct 31 '11 at 20:13