[OS X TeX] blackboard bold semicolon

[Axel E. Retif]

On  23 Jul, 2008, at 20:17, Art Werschulz wrote:

> Hi.
>
> I am trying to produce a blackboard bold semicolon.  My test file  
> is as follows:
>
> \documentclass[12pt]{article}
> \usepackage{amsfonts}
>
> \begin{document}
> $R{\mathbb{;}}S$ and $R;S$ should look different (the semicolon should
> be blackboard bold and normal, respectively).  Also, look at
> $\mathbb{R;S}$ and $R;S$ the complete math expressions should be
> blackboard bold and normal, respectively).
> \end{document}

Curiously, \textbb does work, whereas \mathbb doesn't:

\documentclass{article}
\usepackage{amsfonts}%  <- with or without this
\usepackage{bbold}%     <- but you have to use this
\begin{document}
$\mathbb{;}$ \textbb{;}
\end{document}

Best,

Axe;