2007
Schoenecker, Kevin
Wyman, Bostwick F.
A noncommutative Jordan Algebra, J, of degree two can be constructed
from an anticommutative algebra S that has a symmetric associative
bilinear form. If additional conditions are put on the algebra S,
information about the derivations and automorphisms of J can be
obtained. If S is a n+1 dimensional algebra, and T is a nonsingular
linear transformation on S, it is of interest to know what
multiplications and what nondegenerate symmetric associative bilinear
forms, can be put on S so that T(T(x)T(y))=xy for all x,y,z in S, and T
is equal to its adjoint. If T has only one Jordan block the question is
answered, in the form of conditions that must be satisfied on the
multiplication constants. It is shown such algebras exist for all n and
it is shown how to obtain the multiplication tables.