1

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 '13 at 17:56
4

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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}
1

Use \mathbf instead of \textbf.

1

You should change \textbf onto \mathbf.

BTW: LaTeX users will probably suggest you changing $$...$$ onto \[...\].

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