\begin{definition}[Definition:Erdős Number]
A person's '''Erdős number''' is the minimum number of coauthored publications away from a publication with {{AuthorRef|Paul Erdős}}.
The '''Erdős number''' of {{AuthorRef|Paul Erdős}} himself is defined as $0$.
{{NamedforDef|Paul Erdős|cat = Erdős}}
\end{definition}