Point sets that minimize $(\le k)$-edges, 3-decomposable drawings, and the rectilinear crossing number of $K_{30}$

M. Cetina, C. Hernández-Vélez, J. Leaños +1

There are two properties shared by all known crossing-minimizing geometric drawings of $K_n$, for $n$ a multiple of 3. First, the underlying $n$-point set of these drawings has exa…