\cdbreserved{indexbracket}{}

Denotes a group of objects with indices which are collectively
written, as in~\mbox{$(A + B + C)_{m n}$}.

The default properties of \verb|\indexbracket| are
\begin{verbatim}
\indexbracket{#}::Distributable.
\indexbracket{#}::IndexInherit.
\end{verbatim}
~


