Drawings of complete graphs in the projective plane

Alan Arroyo, Dan McQuillan, R. Bruce Richter +2

Hill's Conjecture states that the crossing number $\text{cr}(K_n)$ of the complete graph $K_n$ in the plane (equivalently, the sphere) is $\frac{1}{4}\lfloor\frac{n}{2}\rfloor\lflo…