\begin{tikzpicture}[auto,scale=0.7,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 [label=below:$f_X \in \bset{\FF_{c_1}}$] (ec1) at (-1,-2) ;
\coordinate [label=below:$f_X \in \bset{\FF_{c_2}}$] (ec2) at (1,-2);
% Directed edge
\path (i) edge node[right] {} (p);
\path (i) edge node[above,near end] {$\bcancel{X}$} (c1);
\path (i) edge node[above,near end] {$\bcancel{X}$} (c2);
\path (c1) edge[dotted]  (ec1);
\path (c2) edge[dotted]  (ec2);
%\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}