# How to make all math bold by default in LuaLaTeX

I would like to make all of my equations bold by default in a LuaLaTeX document that uses the lmodern math font. The answer to this question suggests using \boldmath, but I can't get it to work while using my current font setup. How can I get bold math characters by default here without wrapping all equations in \mathbf?

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{latinmodern-math.otf}

\begin{document}

$a = \alpha\times\beta$

$\mathbf{a = \alpha\times\beta}$

\boldmath
$a = \alpha\times\beta$

\end{document}
• There is no bold Latin Modern Math font. Mar 10 '15 at 20:35
• True, but \mathbf works as expected in my example. Mar 10 '15 at 20:36
• That just emboldens letters using the bold text font. Mar 10 '15 at 20:37
• Yes, that's what I'm trying to do by default in equations. I suppose I should reword my question slightly. Mar 10 '15 at 20:39
• I'm not sure I'm following you. I can understand making “F” bold as a vector, but not mass, which is a scalar quantity. Mar 10 '15 at 20:44