\begin{tikzpicture}[auto,scale=\rthinning,transform shape]
	% x node set with absolute coordinates
	\node (i) at (0,0) [label=left:$i$,point];
	\node (c1) at (-1,-1) [label=left:$c_1$,point];
	\node (c2) at (1,-1) [label=right:$c_2$,point];
	\node (p) at (0,1) [label=left:$p$,point];
	\coordinate [] (ep) at (0,2);
	\coordinate [] (ec1) at (-1,-2);
	\coordinate [] (ec2) at (1,-2);
	% Directed edge
	\path (i) edge (p);
	\path (i) edge node[above,near end] {$\bcancel{X}$} (c1);
	\path (i) edge node[above] {} (c2);
	
	%\draw[dotted] (p) -- (ep);
	%\draw[dotted] (c1) -- (ec1);
	%\draw[dotted] (c2) -- (ec2);
	% Bidirected edge
	%\path[bidirected] (A) edge[bend left=60] (C);
	%\node at ($(1)!.5!(2)$) {\ldots};
\end{tikzpicture}
