%
% Euclidean Jordan algebras.
%
\ifx\havemjoeja\undefined
\def\havemjoeja{1}
% The jordan product of its two arguments.
%
% The choice of \circ here (as opposed to, say, \bullet) was a tough
% one. On the one hand, the \circ operator already means function
% composition, and function composition does appear in the context of
% (Euclidean) Jordan algebras. On the other hand, the meaning would
% be unambiguous to a mathematician. Perhaps more importantly -- the
% \circ is much easier to write on the board if one intends to teach
% this material. Finally, the \circ is used by Koecher, Alizadeh,
% Baes, Gowda, et cetera and seems to be more popular. Full
% disclosure: the \bullet is used by McCrimmon.
%
% It is for this reason that we have segregated the Jordan product
% into its own LaTeX file; we probably wouldn't want to use \circ as
% a (bilinear) algebra multiplication in any other context.
\newcommand*{\jp}[2]{{#1} \circ {#2}}
\fi