[texhax] package

[Philip TAYLOR]

Uwe Lück wrote:

> Nice ... no proposal yet? Joanne Snow's? [continued below]

My version :

\def \halfbox #1%
     {%
         {\setbox 0 = \hbox {$\scriptstyle #1$}%
          \dimen 0 = \ht 0
          \advance \dimen 0 by 0,4 pt
          \ht 0 = \dimen 0
          \dimen 0 = \dp 0
          \advance \dimen 0 by 0,4 pt
          \dp 0 = \dimen 0
          \vbox {\hrule \hbox {\vrule \box 0}}%
         }%
     }
$$a_\halfbox n$$
\end