Parameters c 3 {\displaystyle c_{3}} and c 6 {\displaystyle c_{6}} describe the geometry of the surface in the π {\displaystyle \pi } -plane.
Die Parameter c 3 {\displaystyle c_{3}} und c 6 {\displaystyle c_{6}} beschreiben die Geometrie der Fläche in der π {\displaystyle \pi } -Ebene.