 Lou M. Pretorius

Lou M. Pretorius worked with Noam Elkies and Konrad J. Swanepoel on Sylvester-Gallai theorem analogues over complex numbers and quaternions. The original byline verifies the printed name.^[ref]

They give an elementary complex-case proof and a quaternionic extension. Requiring a third configuration point on each pair's line forces containment in a low-dimensional projective flat, with different bounds over different scalar systems.^[ref]