Special about this point is that it lies on QL-L9, the M3D Line.
Coordinates:
1st CT-coordinate:
l3 (m - n)2 (m + n) - 2 l2 (m2 - n2)2 - 2 m2 n2 (m2 - m n + n2) + l m n (m + n) (4 m2 - 7 m n + 4 n2)
1st DT-coordinate:
(m2-n2) (l2 (l2+m2+n2) - 3 m2n2)
Properties:
- QL-P18 lies on these lines:
- The 3 QA-versions of QL-P18 are collinear (note Eckart Schmidt).
- QL-P18 is the centroid of the three collinear points QG-P15 on QL-L9 (Eckart Schmidt, October 9, 2013). See Ref-34, QFG #286 and #357.