Item 4.1.12.c.

Give an example of a graph \(G = (V, E)\) (probably different than the one above) for which \(N[v] = V\) for some vertex \(v \in V\text{.}\) Is there a graph for which \(N[v] = V\) for all \(v \in V\text{?}\) Explain.

in-context