On the complements of union of open balls of fixed radius in the Euclidean space

M. Longinetti, P. Manselli, A. Venturi

Let an $R$-body be the complement of the union of open balls of radius $R$ in ${\mathbb{E}}^d$. The $R$-hulloid of a closed not empty set $A$, the minimal $R$-body containing $A$, is…