Erdős number [SEP] named after
Erdős number
The Erdős number () describes the "collaborative distance" between mathematician and another person, as measured by authorship of mathematical papers. The same principle has been applied in other fields where a particular individual has collaborated with a large and broad number of peers. 
Overview.
Paul Erdős (1913–1996) was an influential Hungarian mathematician who in the latter part of his life spent a great deal of time writing papers with a large number of colleagues, working on solutions to outstanding mathematical problems. He published more
) was to be detoured from the bridge for all three years of expected construction. A single lane of inbound traffic was expected to be available for the duration of the project, potentially restricted to buses-only at certain hours. A computer animation movie released by MassDOT showed the complex six-stage rehabilitation process in great detail, including temporary installation of a "shoo-fly track" (bypass track) to allow the permanent railbed at the midline of the span to be rebuilt.
The design/build phase of