[Tex/LaTex] How to write a greek letter as bold and not italic?


How to write the letter θ as bold and not italic?

I have tried the following but it gives me the θ as italics and not bold:


Best Answer

Instead of \textbf use \boldsymbol (load the amsmath package to get it) to get it bold, put everything in math mode, and to get it upright use the upgreek package and \uptheta instead of theta:


If you do not need it just for one theta, also see at Bold math: Automatic choice between \mathbf and \boldsymbol for Latin and Greek symbols?