# How to draw a \mapsto in TikZ?

Does anyone know how to draw a line which looks like \mapsto by using \draw[...]... in TikZ?

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-1: Doesn't show any effort. I don't know any TikZ, but I don't think this should be too hard. (If something about it were hard, the specific problem could've been articulated.) We don't want "please do this for me" questions. –  doncherry Sep 3 '11 at 20:55
well............ –  SoftTimur Sep 3 '11 at 22:47

This uses the solution from How to make an arrow bigger and change its color in TikZ? to adjust the size of the arrow.

\begin{document}
$a \mapsto b$

\begin{tikzpicture}
\draw [red, |->, decoration={markings,mark=at position 1 with {\arrow[scale=1.7,red]{>}}},
postaction={decorate},
shorten >=0.4pt
] (0,0) node [black,left] {$a$} -- (0.4,0) node [black,right] {$b$};
\end{tikzpicture}
\end{document}


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