\begin{ccRefFunction}{parallel}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Line_2<Kernel>& l1,
                          const Line_2<Kernel>& l2);}
{returns \ccStyle{true}, if \ccc{l1} and \ccc{l2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Ray_2<Kernel>& r1,
                          const Ray_2<Kernel>& r2);}
{returns \ccStyle{true}, if \ccc{r1} and \ccc{r2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Segment_2<Kernel>& s1,
                          const Segment_2<Kernel>& s2);}
{returns \ccStyle{true}, if \ccc{s1} and \ccc{s2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Line_3<Kernel>& l1,
                          const Line_3<Kernel>& l2);}
{returns \ccStyle{true}, if \ccc{l1} and \ccc{l2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Plane_3<Kernel>& h1,
                          const Plane_3<Kernel>& h2);}
{returns \ccStyle{true}, if \ccc{h1} and \ccc{h2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Ray_3<Kernel>& r1,
                          const Ray_3<Kernel>& r2);}
{returns \ccStyle{true}, if \ccc{r1} and \ccc{r2} are parallel or if one
of those (or both) is degenerate.}

\ccHtmlNoLinks
\ccFunction{bool parallel(const Segment_3<Kernel>& s1,
                          const Segment_3<Kernel>& s2);}
{returns \ccStyle{true}, if \ccc{s1} and \ccc{s2} are parallel or if one
of those (or both) is degenerate.}

\end{ccRefFunction}