\begin{ccRefFunction}{radical_line}

\ccHtmlNoLinks
\ccFunction{Line_2<Kernel> radical_line(const Circle_2<Kernel>& c1,
					  const Circle_2<Kernel>& c2);}
{returns the radical line of the two circles. 
\ccPrecond{$c1$ and $c2$ are not cocentric.}}

\end{ccRefFunction}