The comparison operators ( >, >=, <, <= ) for HepLorentzVector act by comparing first the time component, then the Hep3Vector part. The latter comparison is done using definition ().
( >, >=, <, <= )
![[*]](cross_ref_motif.gif)
).
![\begin{displaymath}
w_1 > w_2 \mbox{ if }
t_1 > t_2 \mbox { or } \left[
t_1 = t_2 \mbox { and }
\vec{v}_1 > \vec{v}_2 \right]
\end{displaymath}](img222.gif){kind=small}