relation-symbolssymbols
I am defining a new relation in one of my new papers. I want to use the following symbol, because it conveys the meaning of my relation. Is there such a symbol in LaTex ? It is very similar to \leq and \preceq. If not, is there a way to add new symbols by hacking the back-end of LaTeX.
Edit: Following TH's advice, this would be a better command to use:
\newcommand{\trel}{\mathrel{\mathsurround=0pt \mbox{\raisebox{1.2pt}{\tiny \textbf{\textbar }}$\rhd$}}}
(I decided to explicitly say \mathsurround=0pt rather than just calling \m@th because that way, if Mike wants to paste this into the top of his document, he won't have to call \makeatletter)
Original: I don't know what built-in symbols would correspond to the one you're describing, but if you're just trying to get something done you could use this:
\newcommand{\trel}{\mbox{\raisebox{1.2pt}{\tiny \bf \textbar }$\rhd$}}
(and then use \trel every time you want to use this relation).
It's a huge hack, but, like I said, it might be enough to get you by.
A free SVG version can be found on Wikimedia: Symbol thumbs up.
The file Symbols_thumbs_up.svg can be converted with Inkscape to PDF like in this answer:
inkscape --export-pdf=Symbol_thumbs_up.pdf Symbol_thumbs_up.svg
The white margins can be removed by pdfcrop:
pdfcrop Symbol_thumbs_up.pdf
The result is Symbols_thumbs_up-crop.pdf.
In LaTeX it can be included, mirrored and resized by package graphicx with a driver that supports PDF. Otherwise it can be converted to EPS via pdftops of xpdf or poppler:
pdftops -eps Symbols_thumbs_up-crop.pdf Symbols_thumbs_up.eps
LaTeX example that defines \LeftThumbsUp and \RightThumbsUp:
\documentclass{article}
\usepackage{graphicx}
\newcommand*{\RightThumbsUpAux}[1]{%
\begingroup
\sbox0{Ag}%
\raisebox{-\dp0}{%
\includegraphics[{%
height=\dimexpr\dp0+\ht0\relax,
#1%
}]{Symbol_thumbs_up-crop.pdf}%
}%
\endgroup
}
\newcommand*{\RightThumbsUp}{%
\RightThumbsUpAux{}%
}
\newcommand*{\RightThumbsDown}{%
\RightThumbsUpAux{origin=c,angle=180}%
}
\newcommand*{\LeftThumbsUp}{%
\scalebox{-1}[1]{\RightThumbsUp}%
}
\newcommand*{\LeftThumbsDown}{%
\scalebox{-1}[1]{\RightThumbsDown}%
}
\begin{document}
\begin{tabular}{ll}
\LeftThumbsUp & \verb|\LeftThumbsUp|\\
\RightThumbsUp & \verb|\RightThumbsUp|\\
\LeftThumbsDown & \verb|\LeftThumbsDown|\\
\RightThumbsDown & \verb|\RightThumbsDown|
\end{tabular}
\end{document}
Best Answer
Here's an attempt (better than the first one).