4

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?

4
  • 1
    Your expectations were too optimistic: somebody has to draw those symbols and have a good reason to. I'm not really sure anybody has had one until now.
    – egreg
    Nov 14 '13 at 10:07
  • I found a lot of them here: en.wikipedia.org/wiki/Blackboard_bold and thought they were commonly used...
    – jonalv
    Nov 14 '13 at 10:16
  • One of the bad influences Mathematica™ has had on typesetting.
    – egreg
    Nov 14 '13 at 10:20
  • the lowercase blackboard bold alphabet has been included in unicode, so these letters are in the stix and xits fonts. Nov 14 '13 at 21:43
9

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}
5
  • Isn't bbm still in Type3 format? ie. may look ragged when scalled up (some publishers will not accept Typo3 fonts).
    – daleif
    Nov 14 '13 at 10:23
  • @daleif -- Yes, I believe so. I picked up and came to know this knowledge while having this same trouble typing math.
    – Jesse
    Nov 14 '13 at 11:41
  • Very much confirmed. It looks terrible :(
    – jonalv
    Nov 14 '13 at 15:08
  • @jonalv -- Thank you for the information. I know there is(was?) a package called doublestroke which is of type 1, but it is unavailable currently at CTAN. The command to use for this package is \mathds{...}.
    – Jesse
    Nov 14 '13 at 16:23
  • The package doublestroke is on CTAN, but it does not contain lower case double stroke letters except for 𝕙 and 𝕜.
    – Marijn
    Mar 13 '20 at 11:54

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