If 
and 
are distinct trilinear points, neither lying on a sideline
of the reference triangle 
,
then the crosspoint of 
and 
is the point
 |
Let 
be the Cevian
triangle of 
and 
the Cevian
triangle of 
. Let 
,
and define 
and 
cyclically. Then 
is the perspector of triangles
and 
.
is the 
-cross conjugate of 
and 
is the 
-cross conjugate of 
.
