# [texhax] Question about Small \sum

Tue Feb 14 17:35:43 CET 2006

On Tue, Feb 14, 2006 at 10:32:44PM +0800, Leung Ngai-Hang Zachary wrote:
> I'm wondering if there's a better way to make the \sum symbol small---after
> all \textstyle affects the entire $...$ section, and I may just want
> to change that symbol.

You might like this approach:

\def\textsum{\mathop{\textstyle\sum}\limits}

$\textsum_{i=0}^n a_i$\quad $\sum_{i=0}^n a_i$.
$$\textsum_{i=0}^n a_i \qquad \sum_{i=0}^n a_i.$$

Best,
Oleg