Matrix Representation of Octonions and Generalizations

Details Matrix Representation of Octonions and Generalizations Matrix Representation of Octonions and Generalizations

1999-06-09

arxiv.org/abs/hep-th/9906065v1

J.Math.Phys. 40 (1999) 4134-4150

Physics

High Energy Physics

High Energy Physics - Theory

18 printed pages

Scientific paper

10.1063/1.532950

We define a special matrix multiplication among a special subset of $2N\x 2N$ matrices, and study the resulting (non-associative) algebras and their subalgebras. We derive the conditions under which these algebras become alternative non-associative and when they become associative. In particular, these algebras yield special matrix representations of octonions and complex numbers; they naturally lead to the Cayley-Dickson doubling process. Our matrix representation of octonions also yields elegant insights into Dirac's equation for a free particle. A few other results and remarks arise as byproducts.

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