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I am looking for this symbol:

image

I recently discovered it in a paper. However, I was not able to find it in the "Comprehensive List" (symbols-a4.pdf) or anywhere else.

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Have a look at “How to look up a symbol?” for ideas how you can easily find a particular symbol. –  Martin Schröder Sep 29 '12 at 23:33
    
I tried all of the steps mentioned there, but thanks anyways. –  user1658887 Sep 29 '12 at 23:49
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5 Answers 5

up vote 4 down vote accepted

I've never seen this symbol, but you can easily build one very similar. This is my approach in text mode: MWE

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{ifsym}
\newcommand{\arrowdot}{\rule[0.5ex]{2em}{0.1em}%
\hspace{-1em}\textbullet{}%
\raisebox{-.2em}{\textifsymbol[ifgeo]{116}}
}
\newcommand{\arrowdotdot}{\rule[0.5ex]{2em}{0.1em}%
\hspace{-1.5em}\textbullet{}\textbullet{}%
\raisebox{-.2em}{\textifsymbol[ifgeo]{116}}
}


\begin{document}

\textbackslash{\tt arrowdot~~~} \arrowdot

\textbackslash{\tt arrowdotdot} \arrowdotdot
\vspace{3ex}

Subway \arrowdot Airport \arrowdotdot Railway

\end{document}
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Thanks a lot. This is very close to what I have been looking for. –  user1658887 Sep 30 '12 at 17:10
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This could be what you're looking for:

\newcommand{\todot}{%
  \mathrel{\ooalign{\hfil$\vcenter{
    \hbox{$\scriptscriptstyle\bullet$}}$\hfil\cr$\to$\cr}
  }%
}
\newcommand{\longtodot}{%
  \mathrel{\ooalign{\hfil$\vcenter{
   \hbox{$\mkern6mu\scriptscriptstyle\bullet$}}$\hfil\cr$\longrightarrow$\cr}
  }%
}

enter image description here

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Looks great! This gives me an idea on how to achieve it. Thanks! –  user1658887 Sep 29 '12 at 23:49
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You can also use the usual overkill option of tikz which then gives you all the flexibility inherent in tikz. Here are a few of the possible options where you can easily control the location of the dot (pos=<percent>), arrow length (x=<length>), arrow type, and color:

enter image description here

Further Enhancements

  • If desired this could be enhanced to provide separate draw options for the arrow and the dot.

Code:

\documentclass{article}
\usepackage{calc}
\usepackage{tikz}

\newcommand{\arrowdot}[1][]{% #1 = optional draw paramaters (applies to both arrow and dot)
    \mathrel{%
        \tikz [x=0.75cm, y=\heightof{\strut}, line width=.2ex, ->, baseline, #1] 
            \draw (0,0.4) -- (1,0.4) 
            node [pos=0.4,shape=circle, fill=black, draw, inner sep=1pt, #1] {};
    }%
}%

\begin{document}
    $A \arrowdot B$

    $A \arrowdot[pos=0.5, -latex, x=1.2cm] B$

    $A \arrowdot[pos=0.6,red,->] B$

    $A \arrowdot[pos=0.2,blue, -stealth] B$
\end{document}
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If you are looking for any symbol, you can find it on this pattern recognition machine! It is really awesome!!!

You can find it here

Just draw your symbol on the white window and voila!!!

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I tried dtexify and it did not work in this case. –  user1658887 Sep 30 '12 at 17:11
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The chemfig manual have also an interesting example of arrows with dots:

MWE

\documentclass{article}
\usepackage{chemfig}
\begin{document}

% Example from chemfig manual, page 58
% http://mirrors.ctan.org/macros/generic/chemfig/chemfig_doc_en.pdf

\makeatletter
\definearrow4{-.>}{%
\edef\pt@radius{\ifx\@empty#4\@empty 2pt\else #4\fi}% dot radius
\CF@arrow@shift@nodes{#3}%
\expandafter\draw\expandafter[\CF@arrow@current@style,-CF@full](\CF@arrow@start@node)--(\CF@arrow@end@node)
coordinate[midway](mid@point);
\filldraw(mid@point)circle(\pt@radius);%
\CF@arrow@display@label{#1}{0.5}{+}{\CF@arrow@start@node}{#2}{0.5}{-}{\CF@arrow@end@node}
}
\makeatother


\schemestart
A \arrow{-.>} B \arrow{-.>[above][below][][1pt]} C \arrow{-.>[][below]}[30] D \arrow{-.>[above][][5pt][1.5pt]} E
\schemestop

\end{document}
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