While we're on Erdős and Terrance Tao, Terrance has an Erdős number of 2 (https://en.wikipedia.org/wiki/List_of_people_by_Erd%C5%91s_number#.232 https://en.wiki

While we're on Erdős and Terrance Tao, Terrance has an Erdős number of 2 (https://en.wikipedia.org/wiki/List_of_people_by_Erd%C5%91s_number#.232 https://en.wikipedia.org/wiki/List_of_people_by_Erd%C5%91s_n...) so whilst having met Erdős as a boy (https://en.wikipedia.org/wiki/Terence_Tao#Personal_life https://en.wikipedia.org/wiki/Terence_Tao#Personal_life) he never collaborated with him on a paper. (Probably due to differences in ages). It's amazing to see the influence Paul Erdős had on people. There is a children's story (that I read to my kids) about his incredible life. http://www.amazon.com/The-Boy-Who-Loved-Math/dp/1596433078 http://www.amazon.com/The-Boy-Who-Loved-Math/dp/1596433078