\RequirePackage{array}

% "L" in array and tabular specifiers is like "l" except it toggles
% math mode.  Similarly for "C" and "R".
\newcolumntype{L}{>{$\relax}l<{\relax$}}
\newcolumntype{C}{>{$\relax}c<{\relax$}}
\newcolumntype{R}{>{$\relax}r<{\relax$}}
