Daniel McGinnis: A family of convex sets in the plane satisfying the ( 4 , 3 ) -property can be pierced by nine points.
McGinnis DanielBBC+G Seminar
on 3/25/22
We investigate order types of lines and -flats in . We give a definition for an order of oriented lines in as a permutation and show that two-sided stacked permutations are universal.