Vertically aligning limits of consecutive math operators

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Vertically aligning limits of consecutive math operators

by Stefan Kottwitz » Wed Oct 20, 2021 11:55 pm

Here is an example taken from the LaTeX Cookbook, Chapter 10, Advanced Mathematics:

Code: Select all

\documentclass[border=10pt,preview]{standalone}
\usepackage{dsfont}
\begin{document}
\[
  \lim_{n\to\infty} \sup_{x\in\mathds{R}} f_n(x^2)
  < n \Big(\sum_{x\in\mathds{R}, n\in\mathds{N}}
  \big| f_n(x^2) \big| \Big)
\]
\end{document}
We get:
inequality.png
inequality.png (14.04 KiB) Viewed 158676 times
Now we load the mathtools package, use the \adjustlimits command right before the \lim operator, insert \smashoperator to remove that big white space before \sum, and change x^2 to \cramped{x^2} to slightly lower the exponent, at both places:

Code: Select all

\documentclass[border=10pt,preview]{standalone}
\usepackage{dsfont}
\usepackage{mathtools}
\begin{document}
\[
  \adjustlimits\lim_{n\to\infty} \sup_{x\in\mathds{R}}
    f_n(\cramped{x^2})
    < n \Big( \smashoperator{\sum_{x\in\mathds{R},
    n\in\mathds{N}}}
    \big\lvert f_n(\cramped{x^2}) \big\rvert \Big)
\]
\end{document}
We get:
finetuned.png
finetuned.png (12.5 KiB) Viewed 158676 times
You can see that the limits onm the left side have been adjusted vertically, and some more mentioned finetuning. The mathtools manual gives further information.

Stefan

Vertically aligning limits of consecutive math operators

by Reader » Wed Oct 06, 2021 5:04 pm

Near the end of Chapter 9, Writing Math Formulas, it's mentioned that with the mathtools package we can align limits of consecutive math operators vertically.

Do you have an example how to do that?

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