On the Number of Ordinary Lines Determined by Sets in Complex Space

Abdul Basit, Zeev Dvir, Shubhangi Saraf & Charles Wolf
Kelly's theorem states that a set of n points affinely spanning C^3 must determine at least one ordinary complex line (a line passing through exactly two of the points). Our main theorem shows that such sets determine at least 3n/2 ordinary lines, unless the configuration has n-1 points in a plane and one point outside the plane (in which case there are at least n-1 ordinary lines). In addition, when at most n/2 points are...
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