fig026_evii.pgf

% (c) 2012 Dimitrios Vrettos - d.vrettos@gmail.com
\begin{tikzpicture}[x=5mm, y=5mm,font=\small]

\draw (2,0) circle (2.5) (0,2.5)node {$P$};
\draw (5,0) circle (2.5) (7.5,2.5)node {$C$};

\foreach \x in {1,2,3,4}
\foreach \y in {-1,0,1}
\draw[fill] (\x,\y) circle (1pt);

\foreach \z in {.5,1.5,3.5}
\draw[fill] (\z,.5) circle (1pt);

\foreach \i in {5,5.8,6.6}
\foreach \j in {1.5,1,.5,0,-.5,-1,-1.5}
\draw[fill] (\i,\j) circle (1pt); 
\end{tikzpicture}