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2003 | 97 | 2 | 251-276
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Dissident maps on the seven-dimensional Euclidean space

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Our article contributes to the classification of dissident maps on ℝ ⁷, which in turn contributes to the classification of 8-dimensional real division algebras.
We study two large classes of dissident maps on ℝ ⁷. The first class is formed by all composed dissident maps, obtained from a vector product on ℝ ⁷ by composition with a definite endomorphism. The second class is formed by all doubled dissident maps, obtained as the purely imaginary parts of the structures of those 8-dimensional real quadratic division algebras which arise from a 4-dimensional real quadratic division algebra by doubling. For each of these two classes we exhibit a complete (but redundant) classification, given by a 49-parameter family of composed dissident maps and a 9-parameter family of doubled dissident maps respectively. The intersection of these two classes forms one isoclass of dissident maps only, namely the isoclass consisting of all vector products on ℝ ⁷.
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  • Matematiska institutionen, Uppsala universitet, Box 480, SE-751 06 Uppsala, Sweden
  • Matematiska institutionen, Uppsala universitet, Box 480, SE-751 06 Uppsala, Sweden
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bwmeta1.element.bwnjournal-article-doi-10_4064-cm97-2-10
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