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I wonder if there is any package that produces a \mathbb{} symbol for lowercase letters.

Thanks in advance!

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2 Answers 2

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After a little searching on the internet, I found the bbm package that produces the blackboard symbol for lowercase letter

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You can use mathbbol package:

\documentclass{article}

\usepackage{mathbbol}

\begin{document}

\[ \mathbb{abcd} \]

\end{document}

enter image description here

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    Well, they show some likeness with black board letters but I would not use them. I find those letters awkward. Especially the upper case letters are awful. The answer itself is syntactically ok.
    – user31729
    Jul 9, 2015 at 8:22
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    @ChristianHupfer I agree with you. Nothing like amsfonts :) Jul 9, 2015 at 9:01
  • The blackboard bold alphabets are described in table 213 of the Comprehensive list cited in the accepted answer.
    – egreg
    Jul 9, 2015 at 9:22

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