On the distances between the core center and other central parts of a tree

Akash De, Kamal Lochan Patra

Let $T$ be a tree. For a vertex $v\in V(T)$, the eccentric subtree number ${\epsilon }_T(v)$ is defined as ${\epsilon }_T(v)=\min \{f_T(v,u):u\in V(T)\}$ where $f_T(v,u)$ denotes the number of subtree…