Talk:Eduard Study

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[edit] Dual number origin

According to B.L. van der Waerden's A History of Algebra (1985), it was William Kingdon Clifford that was using this planar algebra at first. A correct statement is that Eduard Study used dual number coefficients for quaternions to represent the Euclidean group of rigid motions. The reference given is Math. Annalen 39:441-566. Date 1891.Rgdboer 22:51, 30 August 2007 (UTC)

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