Definder - what does the word mean?

What is Erdős-number?

The Erdős number (Hungarian pronunciation: ˈɛrdøːʃ) describes the "collaborative distance" between a person and mathematician Paul Erdős, as measured by authorship of mathematical papers.

Mathematician Daniel Kleitman have collaborated with Paul Erdős so his Erdős-number is 1.

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Erdős-number - meme gif

Erdős-number meme gif

Erdős-number - video

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