Math & Science ⇒ Derivatives in Beamer

[latexhelp1]

In beamer, how do you express derivatives, like f'(x)? When I do that, the prime sign is placed almost directly above the f rather than between the f and the (

Code: Select all

$m '(f) > 0$ 

I would appreciate any help!

[Frits]

Please provide a Minimal Working Example of you document. I think the problem is not beamer but something else in your preamble, as I'm not experiencing this when making a beamer document without calling any other packages.

[latexhelp1]

Thank you so kindly for responding. I hope it is not a problem but I am providing all of my packages because I do not know which one would be causing this problem.

Code: Select all

\documentclass[professionalfont]{beamer}
\mode<presentation>
\usetheme{Warsaw}
\usetheme{CambridgeUS}
\begin{document}

\frame
{
\frametitle{Slide Title}
\textbf{Model:} 
\vspace{0.05cm}
\begin{itemize}
\item Utility increases with consumption: $m '(c) > 0$ 
\end{itemize}
}

\end{document}

Please provide a Minimal Working Example of you document. I think the problem is not beamer but something else in your preamble, as I'm not experiencing this when making a beamer document without calling any other packages.

[Frits]

I don't see the problem, I still get a 'normal' prime next to the character (m) and before the opening bracket.

[Stefan Kottwitz]

Instead of f' you could also write f^\prime. You speak of f'(x), but your example code shows m'(c). m is lower than f, perhaps that's why you think the prime sign is too high.

Your code plus

Code: Select all

\item Compare with $f '(x)$ or $f ^\prime(x)$

gives:

model.png (13.78 KiB) Viewed 9840 times

Stefan

[latexhelp1]

Thank you for your responses. I implemented this change but don't see much difference in the output. Shouldn't there be more space between the prime and function? See the attached slide. Here's the code

Code: Select all

%\documentclass[fleqn]{beamer}
%\mode<presentation>

\documentclass[professionalfont]{beamer}
\mode<presentation>
\usetheme{Warsaw}
\usetheme{CambridgeUS}

\beamertemplatenavigationsymbolsempty

\begin{document}

\frame
{
\frametitle{Title}

\textbf{Model:} 
\vspace{0.05cm}
\begin{itemize}
\item Original derivative: $m '(f) > 0$ 
\item New derivative: $a ^\prime(f) < 0$
\end{itemize}
}

\end{document}

Instead of f' you could also write f^\prime. You speak of f'(x), but your example code shows m'(c). m is lower than f, perhaps that's why you think the prime sign is too high.

Your code plus

Code: Select all

\item Compare with $f '(x)$ or $f ^\prime(x)$

gives:

model.png

Stefan

[cgnieder]

[...] Shouldn't there be more space between the prime and function? [...]

If you want more space between the prime and the function you could do something like his:

Code: Select all

\documentclass{article}
\newcommand\deriv{^{\mkern1mu\prime}}

\begin{document}
$f'(x)=x^2$

$f\deriv(x)=x^2$
\end{document}

prime.jpg (1.95 KiB) Viewed 9835 times

[latexhelp1]

Thank you for sending this along!! Is there a way to make yet more space? These difference seems to be subtle and I would like more space.

Code: Select all

%\documentclass[fleqn]{beamer}
%\mode<presentation>

\documentclass[professionalfont]{beamer}
\mode<presentation>
\usetheme{Warsaw}
\usetheme{CambridgeUS}
\useoutertheme{miniframes}
\usefonttheme{serif}
\usepackage{beamerthemesplit}
\usepackage{color}
\usepackage{bm}
\usepackage{bbm}
\usepackage{amsmath}
%\usepackage{pdfsync}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{setspace}
\usepackage{amsfonts}
\usepackage{amsmath}
\usepackage{rotating}
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{amsthm}
\usepackage{epic}
\usepackage{eepic}
\usepackage{eepicemu}
\usepackage{epsf}
\usepackage{verbatim}
\usepackage{hyperref}
%\usepackage{showkeys} %Shows labels in compilation
%\usepackage{syntonly} %Runs document but doesn't produce pdf: faster
\usepackage{mathptmx}
\usepackage[scaled]{helvet}
\usepackage{pstricks,pst-node,pst-tree}
\usepackage{fix-cm}

\newcommand\deriv{^{\mkern1mu\prime}}

\newcommand{\ind}{\mathbf{1}}
\newrgbcolor{darkred}{.75 0 0.15}
\newrgbcolor{darkerred}{.45 0 0.15}
%\hypersetup{linkbordercolor=red, filecolor=red, linkcolor=red}
\usebuttontemplate{\color{darkerred}\insertbuttontext}

\beamertemplatenavigationsymbolsempty

\begin{document}

\frame
{
\frametitle{Title}

\textbf{Model:} 
\vspace{0.05cm}
\begin{itemize}
\item Original derivative: $m '(f) > 0$ 
\item New derivative: $a\deriv(f) < 0$
\end{itemize}
}

\end{document}

[...] Shouldn't there be more space between the prime and function? [...]

If you want more space between the prime and the function you could do something like his:

Code: Select all

\documentclass{article}
\newcommand\deriv{^{\mkern1mu\prime}}

\begin{document}
$f'(x)=x^2$

$f\deriv(x)=x^2$
\end{document}

prime.jpg

[cgnieder]

The space added in my example is

Code: Select all

1mu

Just change it to a value you feel appropriate, e.g.

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1.5mu

[ChenMeng]

Hi all,

I'm sorry to disturb, however, there might be something new for this thread.

I met the same problem here, and since the OP didn't show his/her compiler, I tried different compilers for the MWE. Interestingly, different compliers give different result.

MWE:

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\documentclass{beamer}
\begin{document}
\begin{frame}
\[
  f^{\prime}(x).
\]
\end{frame}
\end{document}

pdfLaTeX gives:

pdflatex_mwe.png (10.63 KiB) Viewed 7915 times

while XeLaTeX gives:

xelatex_mwe.png (9.85 KiB) Viewed 7915 times

which is obviously inappropriate.

In XeLaTeX version, a simple line of \usepackage[T1]{fontenc} solves the problem.

Is this a bug of beamer or XeLaTeX? It might be linked to the Latin Modern Font?