I can't for the life of me get XeTeX to give me bold lowercase greek symbols, even though I have checked, e.g., in a word processor, that the font has a corresponding bold typeface with the greek character on my computer.

I use Linux Libertine for my normal font, and also for the digits in math mode; however, I wish to use minion pro for the latin/greek math characters.

Working example:



\setmainfont[Mapping=tex-text]{Linux Libertine O}

\setmathfont(Digits){Linux Libertine O}
\setmathfont(Latin,Greek){Minion Pro}


Text. Some \textbf{bold text}; this all comes out in Linux Libertine.
    \boldsymbol\pi = \left< \pi_1, \pi_2\right>

The above equations should render an emboldened pi character and two regular pi characters. 

OK, when I run the above I just get the same pi characters, which are all in Minion Pro, but the first one is not emboldened.

Any ideas?

1 Answer 1


\boldsymbol uses \mathversion{bold}, but mathspec doesn't declare fonts for the bold math. Try this in your preamble:

\fontspec{Minion Pro} %sets \zf@family to minion pro.

\fontspec{Linux Libertine O}
  • 1
    Great! That works perfectly! One little thing (which I don't think warrants another question) - how do I set the character to uppercase? I tried \mathrm and \rm but the character disappears; do I need to append something to your answer?
    – e-dard
    Feb 21, 2011 at 17:07
  • I don't understand your question. Are you looking for \Pi? Feb 21, 2011 at 17:15
  • Sorry for being confusing. No, I'm not looking for \Pi. I should not have said uppercase! I'm after \pi with a normal emphasis, i.e., not italicised; as if you were defining a vector with \pi (bold and upright).
    – e-dard
    Feb 21, 2011 at 17:44
  • \setmathrm{Minion Pro} and then \mathrm{\pi} or \boldsymbol{\mathrm{\pi}} Feb 21, 2011 at 18:04
  • Thanks! I don't know why I thought it was as simple as just specifying the font family. :-)
    – e-dard
    Feb 21, 2011 at 18:27

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