Paul Erdös
But not everyone was convinced. One person who needed persuading was Paul Erdös, one of the greatest
mathematicians of the 20th century.
Paul Erdös was a poly-mathematician and an eccentric.
He traveled the world over regularly appearing unannounced at a fellow mathematicians doorstep, proclaiming that his brain was open.
He would then assist with any problem that the interloped was working on.