Based on this question I really expected the following to work:
\documentclass{memoir}
\usepackage{amssymb}
\begin{document}
$\mathbb{c,g,d,h,t}$
\end{document}
However, out comes something looking like this:
I have also tried the amsfonts
package with the same results. Clearly I have missed something, but what?
Best Answer
In such case where small letter will fail, you need
\usepackage{bbm}
and use\mathbbm{...}