LaTeX hints
I guess this is off-topic, but I’m always forgetting how to do stuff in . Here are two useful things:
Braces with labels
Do this:
$\ell_p^d=\overbrace{\ell_p^k\oplus\dots\oplus\ell_p^k}^{m \text{ times}}\oplus\ell_p^r$
to get this:
With the obvious variation
$\ell_p^d=\underbrace{\ell_p^k\oplus\dots\oplus\ell_p^k}_{m \text{ times}}\oplus\ell_p^r$
to get this:
Breaking “n-dimensional”
In order to convince to break
-dimensional correctly, use
$n$\nobreakdash-\hspace{0pt}dimensional
(Otherwise will not do anything).
Latex blogs
For more serious stuff, see the Blog on Latex Matters or the Blog on Latex Matters (yes, you’re seeing double). The WordPress FAQ is also useful for latexblogging.