--- Mathematician Paul Erdős, quoted passim, I couldn't track down a source.
In this case, I saw it in Ben Cohen's WSJ story on the AI solution to an Erdős problem
So imagine how unimaginable it was 80 years ago, when the unit distance problem was posed by Paul Erdős, known as the most prolific mathematician in history. He was also known as an eccentric, nomadic genius who lived out of a suitcase, worked around the clock and traveled all over the world, true to his personal motto: “Another roof, another proof.”
