The optimal drawings of K_{5,n}

Cesar Hernandez-Velez, Carolina Medina, Gelasio Salazar

Zarankiewicz's Conjecture (ZC) states that the crossing number cr$(K_{m,n})$ equals $Z(m,n):=\floor{\frac{m}{2}} \floor{\frac{m-1}{2}} \floor{\frac{n}{2}} \floor{\frac{n-1}{2}}$. S…