\begin{tikzpicture}[auto,scale=\rthinning,transform shape]
	% x node set with absolute coordinates
	\node (i) at (0,0) [label=left:$i$,point];
	\node (p) at (0,1) [label=left:$p$,point];
	%\node (a) at (1,2) [label=above:$\AA(i)$,point];
	%\node (p) at (0,2) [label=left:$p$,point];
	%\node (j) at (-2,-4) [label=left:$j$,point];
	%\node (k) at (2,-4) [label=right:$k$,point];
	\coordinate [label=below:$f_X$] (ec1) at (0,-1);
	%\coordinate [label=below:$f_X$] (ec2) at (1.5,1);
	\coordinate [label=above:$f_X$] (a) at (0,2);
	% Directed edge
	\path (i) edge node[left] {$\bcancel{X}$} (p);
	\path (p) edge[dotted] node[left] {} (a);
	%\path (a) edge[dotted] node[right] {} (ec2);
	\path (i) edge[dotted] node[left] {} (ec1);
	%\path (pj) edge node[above] {} (j);
	%\path (pk) edge node[above] {} (k);
	%\draw[dotted] (p) -- (ep);
	% Bidirected edge
	%\path[bidirected] (A) edge[bend left=60] (C);
	%\node at ($(1)!.5!(2)$) {\ldots};
\end{tikzpicture}