Whenever I try to copy blackboard bold letters from mathtype, I receive a translation error, saying that there is no translation available. How would I go about fixing this for the available characters?

Also, is there a way to add other blackboard-bold letters into the program, other than the ones already included, e.g E for expectation?


3 Answers 3


In MathType, if you choose AMS-LaTeX in Cut and Copy Preferences, it will translate the Blackboard Bold capital letters, as well as the lower-case k. If you must use the LaTeX 2.09 and later translator, I can help you change the translator file to add those characters.

  • As you've mentioned, I typically need to use LaTeX 2.09. I've tried editing the translator file but with limited success.
    – Jaffar
    May 31, 2017 at 18:07
  • Ok, I can send you a modified file, but even though you're using LaTeX 2.09 from MathType, you must use the {amssymb} or {amsmath} package in your document, as @Andrew mentioned. If that's OK, email us at support at dessci dot com and I'll send you the modified file. May 31, 2017 at 21:42

Use \usepackage{amssymb} and select AMSLatex in cut copy preferences in Mathtype.

  • Welcome to TeX.SX! How does this differ from the existing answer?
    – TeXnician
    Aug 16, 2018 at 6:06
  • @TeXnician I think because it includes the requirement for a package at the LaTeX end too
    – Joseph Wright
    Aug 19, 2018 at 7:08

I’m not sure if I understand your question correctly. The command to use blackboard bold letters in LaTeX is \mathbb{X}. Make sure to load loaded a font package containing a double-struck alphabet.

If you loaded unicode-math rather than legacy font packages, you can additionally paste Unicode math symbols into your document directly.

You can load the Holey Roman font from Mathtime Pro 2 into LaTeX with \usepackage[bb=mth]{mathalfa}, or the regular Mathtime Pro blackboard bold with \usepackage[bb=mt]{mathalfa}. If it’s not the right height, you might want to add the bbscaled= option inside the brackets, such as \usepackage[bb=mth, bbscaled=0.95]{mathalfa}.

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