I am trying to annotate individual terms of a mathematical expression, as depicted below.
The problem I get is that the comment seems to be taken as part of the fraction, which unnecessarily extends the fraction bar. I want the fraction to look just normally and have the comments not do anything to the size of the fraction.
Maybe it is possible to even offset the comment itself, e. g. to have it justified left, so the greater-or-equal sign sits at the center of the curly brace. And is it possible to reduce the weight of the brace? To me it looks odd being so bold.
I have added an example which should produce the output as shown in the picture.
The \textstyle
inside the \overbrace
is to set the correct font size, because \overbrace
resets it to \displaystyle
as I see it.
Thank you in advance for any help you are kind enough to provide.
%!TEX TS-program = xelatex
%!TEX encoding = UTF-8 Unicode
\documentclass[12pt]{scrartcl}
\usepackage{amsmath}
\usepackage{polyglossia}
\setdefaultlanguage[spelling=new]{german}
\usepackage{geometry}
\geometry{a4paper}
\begin{document}
\[\frac{x^n}{x^m}\cdot \frac{1+{\overbrace{\textstyle \frac{1}{x^n}}^{\geq -\frac{1}{2} \text{ for }|x| \text{ large enough}}}}
{1+{\underbrace{\textstyle \frac{1}{x^m}}_{\leq 1 \text{ for }|x| \text{ large enough}}}}\]
\end{document}
Best Answer
The solution below uses
\mathclap
from themathtools
package.This command tells
TeX
that the content of\mathclap
should not take up any horizontal space (from TeX's point of view), which means thatTeX
will not extend the fraction bar to account for the content of theoverbrace
andunderbrace
And if you change the
\mathclap
to\mathrlap
, then you get