Uniformly connected graphs

Abstract

In this article we investigate the structure of uniformly $k$-connected and uniformly $k$-edge-connected graphs. Whereas both types have previously been studied independent of each other, we analyze relations between these two classes. We prove that any uniformly $k$-connected graph is also uniformly $k$-edge-connected for $k\le 3$ and demonstrate that this is not the case for $k>3$. Furthermore, uniformly $k$-connected and uniformly $k$-edge-connected graphs are well understood for $k\le 2$ and it is known how to construct uniformly $3$-edge-connected graphs. We contribute here a constructive characterization of uniformly $3$-connected graphs that is inspired by Tuttes Wheel Theorem. Eventually, these results help us to prove a tight bound on the number of vertices of minimum degree in uniformly $3$-connected graphs.