Talk:Euler's four-square identity

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Mathematics rating:
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 Field: Number theory

Quaternion multiplication[edit]

I modified the specific 4-square identity so that it has an all plus term; it now corresponds to the quaternion multiplication , rather than the former If someone wants to change it to I have no objection, but it seems important to me that one term is Arthur Rubin (talk) 02:45, 2 July 2014 (UTC)