29 citations · 38 across the 2 of their papers we have counts for
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math.CO2006★ 9 cited
The Sylvester-Gallai Theorem, colourings and algebra
L. M. Pretorius, K. J. Swanepoel
Our point of departure is the following simple common generalisation of the Sylvester-Gallai theorem and the Motzkin-Rabin theorem: Let S be a finite set of points in the plane, wi…
math.CO2003
Blocking sets in small finite linear spaces II
L. M. Pretorius, K. J. Swanepoel
The contents of this paper has been incorporated into math.CO/0308288.
math.CO2003
Blocking sets in small finite linear spaces
L. M. Pretorius, K. J. Swanepoel
We classify all finite linear spaces on at most 15 points admitting a blocking set. There are no such spaces on 11 or fewer points, one on 12 points, one on 13 points, two on 14 po…