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Possible Duplicate:
Separate long math text under sum symbol into different lines?

I want to write expression \sum_{i=0}^n i with i\neq 4 under the summation symbol. How can I write this?

marked as duplicate by Werner, Peter Grill, lockstep, Thorsten, zeroth Nov 5 '12 at 7:32

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136

You can use \substack:

If this is desired in inline math you can use \limits to obtain the limits underneath the summation symbol:

However this is not recommended as it may not look good depending on how much adjacent text there is as it will affect interline spacing.

Code:

\documentclass{article}
\usepackage{amsmath}
\begin{document}
\[
  \sum_{\substack{i=0 \\ i\neq 4}}^n i
\]

In inline math: $\sum_{\substack{i=0 \\ i\neq 4}}^n i$, or
$\sum\limits_{\substack{i=0 \\ i\neq 4}}^n i$
\end{document}
  • 3
    If the \substack content is too wide, you can use \mathclap, as detailed in This answer – Frédéric Grosshans Nov 27 '14 at 16:44
  • Will it work for \underset{}{} as well using \text{} inside? – Royi Mar 23 '18 at 21:52
  • 1
    @Royi: Probably best to ask a new question with a MWE that reproduces the problem you are having. – Peter Grill Mar 24 '18 at 0:43

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