Packing and covering balls in graphs excluding a minor

28 Jul 2020 Bousquet Nicolas van Batenburg Wouter Cames Esperet Louis Joret Gwenaël Lochet William Muller Carole Pirot François

We prove that for every integer $t\ge 1$ there exists a constant $c_t$ such that for every $K_t$-minor-free graph $G$, and every set $S$ of balls in $G$, the minimum size of a set of vertices of $G$ intersecting all the balls of $S$ is at most $c_t$ times the maximum number of vertex-disjoint balls in $S$. This was conjectured by Chepoi, Estellon, and Vax\`es in 2007 in the special case of planar graphs and of balls having the same radius...

PDF Abstract
No code implementations yet. Submit your code now

Categories


  • COMBINATORICS
  • DISCRETE MATHEMATICS
  • METRIC GEOMETRY