Circular planar nearrings: geometrical and combinatorial aspects

Anna Benini, Achille Frigeri, Fiorenza Morini

Let $(N,\Phi )$ be a circular Ferrero pair. We define the disk with center $b$ and radius $a$, $\mathcal{D}(a;b)$, as \[\mathcal{D}(a;b)=\{x\in Φ(r)+c\mid r\neq 0,\ b\in Φ(r)+c,\ |(Φ(r…