Generic projections of the H4 configuration of points
Paulina Wiśniewska, Maciej Ziȩba · Advances in Applied Mathematics · 2022
In the present note we give an example of a finite set of points in P3 which has the so-called geproci property, but it is neither a grid nor a half-grid. This answers a question on the existence of such sets raised by Pokora, Szemberg and Szpond in [4, Problem 5.9].