Noncommutative Jordan division algebras

McCrimmon, Kevin

doi:10.1090/S0002-9947-1972-0320098-6

Noncommutative Jordan division algebras
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Trans. Amer. Math. Soc. 163 (1972), 215-224 Request permission

Abstract:

The structure theory for noncommutative Jordan algebras with chain conditions leads to the following simple algebras: (I) division algebras, (II) forms of nodal algebras, (III) algebras of generic degree two, (IV) commutative Jordan matrix algebras, (V) quasi-associative algebras. The chain condition is always satisfied in a division algebra, hence does not serve as a finiteness restriction. Consequently, the general structure of noncommutative Jordan division algebras, even commutative Jordan division algebras, is unknown. In this paper we will classify those non-commutative Jordan division algebras which are forms of algebras of types (II)-(V); this includes in particular all the finite-dimensional ones.

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