# Vertical Fourier and Laplace “club” symbols

The trfsigns package provides macros for transformation signs, eg: \fourier and \laplace.

I need a vertical version of those symbols.

• These symbols (horizontal or vertical) are also part of the Comprehensive LaTeX Symbol List (Table 72, p 31, amongst others, possibly). For me this is a duplicate of How to look up a symbol or identify a math symbol or character? – Werner Dec 17 '14 at 0:38
• Didn't knew about the symbols from the cited table. However, they are pretty small compared to those from the trfsigns package. – dersimn Dec 17 '14 at 0:51
• It already exists as a Metafont font in the trsym package. There it's a binary relation symbol. – Bernard Dec 17 '14 at 0:54
• @SimonD.Seim: Pretty small can be resized using graphicx and put in a macro as a \mathrel, if needed. – Werner Dec 17 '14 at 0:55

\documentclass[a4paper,oneside,12pt]{report}

\usepackage{trfsigns} % Transformation Symbol o---o \laplace and \Laplace

\usepackage[fleqn]{amsmath}

\newcommand{\vlaplace}[1][]{\mbox{\setlength{\unitlength}{0.1em}%
\begin{picture}(10,20)%
\put(3,2){\circle{4}}%
\put(3,4){\line(0,1){12}}%
\put(3,18){\circle*{4}}%
\put(10,7){#1}
\end{picture}%
}%
}%

\newcommand{\vLaplace}[1][]{\mbox{\setlength{\unitlength}{0.1em}%
\begin{picture}(10,20)%
\put(3,2){\circle*{4}}%
\put(3,4){\line(0,1){12}}%
\put(3,18){\circle{4}}%
\put(10,7){#1}
\end{picture}%
}%
}%

\begin{document}

$s(t) = stuff$
$\vlaplace$
$S(f) = otherstuff$
$\vLaplace[Used Rule No. 1 from Table No. 7]$
$s(t) = again$

\end{document}