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# How to make bold LaTeX math / bm does not work

Please use `\mathbf` instead of `\bm`. So for example write:

```$\mathbf{O(\log n)} + \mathbf{O(\lambda,\,\epsilon)}$```

Alternatively, if you really want to use `\bm`, you need to include the following package in your `header.tex` (click Edit Macros in Document Settings)

```
\usepackage{bm}
```