In the third-order complex the centre locus becomes a finite closed quartic surface, with three (one always real) intersecting nodal axes, every plane section of which is a trinodal quartic. The chief defect of the geometrical properties of these bi-quaternions is that the ordinary algebraic scalar
plane section הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד