Uncle Al wrote:

Math also has the "Erdos number," the distance you are from having
directly collaborated with genius and mildy crazy fellah Paul Erdos.
Direct interface is a 1. Collaborating with a "1" gets you a "2," and
so on.

http://www.paulerdos.com/

There's also the Bacon number, which is the degree of separation of
an actor from the actor Kevin Bacon.

I believe at least one mathematician with an Erdos number also has
a Bacon number. So the two 'domains' are linked!


Cheers

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John R Ramsden )
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"Eternity is a long time, especially towards the end."
Woody Allen