# How to make bold greek letters in Mathjax on Stackexchange?

I already know how to make $$\mathbf {bold}$$ letters, and I know how to make various greek letters such as $$\gamma$$ and $$\Psi$$. But how to make any bold greek characters?

Like this $$\boldsymbol{\alpha}$$ $\boldsymbol{\alpha}$ For comparison a regular one $$\alpha$$

\mathbf{αβγ} or {\bf αβγ} also gives $$\mathbf{αβγ}$$ compared to $$αβγ$$ of the normal series.

• But note ... \mathbf{\alpha\beta\gamma} does not work. – GEdgar Mar 16 '19 at 11:39