How to write numbers in boldface type using LaTeX Beamer

Question

I want to write a vector $1_n$ in bold face where all its entries are one. I have tried all of the following, but it will not work. I even included \userpackage{bm}. But not working. Any help, please?

$\bm{1}_n$\\
$\boldsymbol{1}_n$\\
$\mathbf{1}_n$\\
$\textbf{1}_n$

Welcome to TeX.SX! Rarther than posting code snipptes like this please give a minimal working example. In particular, the code should compile. This said, in what sense do these not work? All of these lines result in a bold-faced 1 for me. In this case, the recommended approach is to use $\mathbf{1}_n$ . — , Sep 15 '20 at 02:20
$\textbf{1}$ works fine for me, the others don't result in boldface. — Jeroen, Dec 11 '20 at 22:09
What fonts are you using in Beamer? It’s possible you selected a font theme without bold math. — Davislor, Feb 12 '21 at 06:14
I had the same problem, which was solved by removing \usepackage[T1]{fontenc} from my preamble. I guess bm and fontenc don't get along well. — Federico Poloni, Jun 14 '22 at 11:34

score 0 · Answer 1 · answered Sep 15 '20 at 02:39

0

I used package \usepackage{amsbsy} and I wrote it as \pmb{1}_n. It works fine for me now.

answered Sep 15 '20 at 02:39

Userabc

129

4

This is only a "last resort" solution for when you have no bold font, it is not real bold, just three 1 overprinting, the forms in the question would produce real bold unless you have code not shown choosing a non standard font set that has no bold font. – David Carlisle Sep 15 '20 at 09:22
Don't use \pmb unless you have any other method to get bold symbols. Try methods that @Zarko gave. If that didn't work, you have to give a minimal working example to tell us what you write. – Syvshc Feb 12 '21 at 07:43

score 0 · Answer 2 · answered Jan 13 '21 at 05:52

It is unclear, what is your problem. More certain we can be, if you would provide an MWE (Minimal Working Example), a small but complete document. As example of it with your code fragment is:

\documentclass{beamer}
\usepackage{bm}
\begin{document}
\begin{frame}[fragile]
\frametitle{Comparison of normal and boldface math variables}
\verb+\bm+:\qquad          $1_n, \bm{1}_n$\
\verb+\boldsymbol+:\qquad  $1_n, \boldsymbol{1}_n$\
\verb+\mathbf+:\qquad      $1_n, \mathbf{1}_n$\
%$\textbf{1}_n$ this should not be used 
\end{frame}
\end{document}

which gives expected result:

How to write numbers in boldface type using LaTeX Beamer

2 Answers2