“…More generally, any graph metric defined by a graph
such that every induced subgraph of
is either a chordal graph, has a cut‐vertex or a nontrivial module [
3]. Several strengthenings of the initial conjecture have been suggested [
13]. Kantor on her own [
11] and together with Patkós [
12] have been investigating the conjecture in the Euclidean plane equipped with
‐metric.…”