distance to maximum degree
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- maximum degree upper bounds distance to maximum degree by a linear function – by definition
- h-index upper bounds distance to maximum degree by a linear function – Remove the $h$ vertices of degree at least $h$ to get a graph that has maximum degree $h$.
- distance to maximum degree upper bounds h-index by a linear function – Removal of $k$ vertices yielding a graph with maximum degree $c$ means that there were $k$ vertices of arbitrary degree and the remaining vertices had degree at most $k+c$. Hence, $h$-index is no more than $k+c$.