[Tex/LaTex] How to use small caps black board bold font

fonts

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:

enter image description here

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{...}

enter image description here

\documentclass{memoir}
\usepackage{amssymb}
\usepackage{bbm}
\begin{document}
$\mathbbm{c,g,d,h,t}$

$\mathbb{R,C}$
\end{document}