and Floor van Lamoen,
The parasix configuration and orthocorrespondence,
3 (2003) 169--180.
Abstract: We introduce the parasix
configuration, which consists of two congruent triangles. The conditions
of these triangles to be orthologic with ABC or a circumcevian triangle,
to form a cyclic hexagon, to be equilateral or to be degenerate reveal
a relation with orthocorrespondence, as defined in an earlier paper.
[ps file] [pdf file]