# Bold text with nested braces

I'm sure this is an easy question, but I'm not sure what the proper terminology is to search for the answer.

$$\textbf{k_{1,1}}$$


LaTeX gets all confused by this. How can I make k_{1,1} bold?

• Welcome to TeX.SE! Do you mean to make the subscript 1,1 bold as well, or "only" the letter k?
– Mico
Apr 28, 2013 at 17:56

Note you should not use $$ in LaTeX. the answer depends on what you mean by bold. If you use \boldmath or \bm the k uses bold math italic. If you use \mathbf then it uses bold upright roman. \documentclass{article} \usepackage{bm} \begin{document} $k_{1,1}$ {\boldmath $k_{1,1}$} mathbf $\mathbf{k_{1,1}}$ bm $\bm{k_{1,1}}$ \end{document}  Use \mathbf instead of \textbf. You should change \textbf onto \mathbf. BTW: LaTeX users will probably suggest you changing $$... onto $...$.