12

How would I do {text}_{i=1}^{i=n} with the written exactly above and below the text?

Hope you can help!

Ruben
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user82130
  • 197
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    Without a proper context and some information about the intended meaning and use it's hard to say which is the best option. In the preamble: \usepackage{amsmath} in the document \[ \overset{i=n}{\underset{i=1}{text}} \] – Gonzalo Medina Jul 21 '15 at 18:20

4 Answers4

11

I assume you'll want the subscript and superscript material to be in display-style math mode and to use a smaller font size than what's used for the "text" string. Sort of like \sum_{i=0}^{\infty}, except for the use of the string "text" instead of the large summation symbol, right?

If these assumptions are correct, you could use the \DeclareMathOperator* directive of the amsmath package to achieve your objective.

enter image description here

\documentclass{article}
\usepackage{amsmath}
\DeclareMathOperator*{\sometext}{text} % "\text" is already taken...
\begin{document}
\[
\sometext_{i=1}^{i=n} % not "{\sometext}"
\]
\end{document}
Mico
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  • 2
    Or \[ \overset{i=n}{\underset{i=1}{text}} \] could also be an option. No info about the context for the expression, it's difficult to decide the best approach. +1, by the way. – Gonzalo Medina Jul 21 '15 at 18:22
  • @GonzaloMedina - It definitely would be helpful to have more context. Your suggestion has the advantage of "working" in both inline-style and display-style math modes. – Mico Jul 21 '15 at 18:26
  • Does this not limit the text to the letters t-e-x-t, rather than arbitrary text? – Steven B. Segletes Jul 21 '15 at 18:29
  • @StevenB.Segletes - I honestly don't know what the intended use case may be. I was assuming that the string "text" (or whatever it may be in practice...) is meant to be fixed. Naturally, this assumption may not be correct. – Mico Jul 21 '15 at 18:35
10

Here are two ways:

\documentclass{article}
\usepackage{amsmath,stackengine}
\stackMath
\begin{document}
\[
\setstackgap{S}{2pt}
\stackunder{\stackon{\text{text}}{\scriptstyle i=n}}{\scriptstyle i=1}
\quad
\underset{i=1}{\overset{i=n}{\text{text}}}
\]
\end{document}

enter image description here

The gap between the text and the over/under-set is defined with \setstackgap{S}{2pt} for the stackengine approach on the left.

Either of these approaches will work in \displaystyle (shown) or in \textstyle. Note, however, that in \textstyle, the line spacing will be affected.

Steven B. Segletes
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3

In addition to the other suggestions you could use: \mathop together with \operatorname from the amsmath package:

\documentclass{article}
\usepackage{amsmath}
\newcommand\mymathop[1]{\mathop{\operatorname{#1}}}
\begin{document}

\[
  \mymathop{text}_{i=1}^{i=n}
\]

This is in a paragraph: $\mymathop{text}_{i=1}^{i=n}$ or $\displaystyle\mymathop{text}_{i=1}^{i=n}$.

\end{document}

enter image description here

A.Ellett
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1

MWE

\documentclass{article}
\usepackage{stackrel}
\begin{document}
Some $\stackrel[i=1]{i=n}{\mathrm{text}}$ in line.
\end{document}
Fran
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