[Tex/LaTex] Put a curly brace under an ellipsis in a math setting

Question

I have

$m\times n = n + n + \dots + n$ 

in my text right now, but I would like to put a curly brace under the \dots to emphasize that there are m,n's involved. How would I do this?

Answer 1

Try to use \overbrace or \underbrace with a _ or ^ as appropiate. Also, I would try to put the curly brace under the whole sum. It seems clearer, in my opinion:

\begin{equation}
  n \times m = \underbrace{n + n + \dots + n}_{m}
\end{equation}