\input{mjo-common}
-% Absolute value (modulis) of a scalar.
+% Absolute value (modulus) of a scalar.
\newcommand*{\abs}[1]{\left\lvert{#1}\right\rvert}
% Norm of a vector.
% specialized to real matrices.
\newcommand*{\transpose}[1]{ #1^{T} }
+% The trace of an operator.
+\newcommand*{\trace}[1]{ \operatorname{trace}\of{{#1}} }
+
% The ``span of'' operator. The name \span is already taken.
\newcommand*{\spanof}[1]{ \operatorname{span}\of{{#1}} }
% The ``co-dimension of'' operator.
\newcommand*{\codim}{ \operatorname{codim} }
-% The trace of an operator.
-\newcommand*{\trace}[1]{ \operatorname{trace}\of{{#1}} }
-
% The orthogonal projection of its second argument onto the first.
\newcommand*{\proj}[2] { \operatorname{proj}\of{#1, #2} }