What is Paul Erdős?
{{Infobox Scientist | name = Paul Erdős | image = Erdos budapest fall 1992 (cropped).jpg | image_width = | caption = Paul Erdős in 1992 | birth_date = {{birth date|1913|03|26}} | birth_place = [[Budapest]], [[Hungary]] | death_date = {{death date and age|1996|09|20|1913|03|26}} | death_place = [[Warsaw]], [[Poland]] | nationality = [[File:Flag of Hungary.svg|20px|]] [[Hungary|Hungarian]] | field = [[Mathematics]] | work_institution =[[Princeton University|Princeton]]<br>[[Purdue University|Purdue]]<br> [[University of Notre Dame|Notre Dame]]<br> Then itinerant | alma_mater = [[University of Peter Pazmany|University of Pázmány Péter]] | doctoral_advisor = [[Lipot Fejer|Leopold Fejér]] | doctoral_students = [[Bonifac Donat]]<br>[[Joseph Kruskal]]<br>[[Alexander Soifer]] | known_for = [[Combinatorics]]<br>[[Graph theory]]<br>[[Number theory]] | prizes = [[Wolf Prize]] (1983/84)<br>[[Cole Prize|AMS Cole Prize]] (1951) | religion = <!--None--> | footnotes = Note that he has an [[Erdős number]] of zero. }} '''Paul Erdős''', also '''Pál Erdős''', in [[English language|English]] '''Paul Erdos''' or '''Paul Erdös''' (March 26, 1913 – September 20, 1996), was a famous [[Hungary|Hungarian]]-born [[mathematician]]. Throughout his career, he worked on and produced many mathematical [[Conjecture|conjectures]] and is known as one of the most productive mathematicians of the 20th century. Erdős worked on and put forward several problems in [[discrete mathematics]], [[graph theory]], [[number theory]], [[mathematical analysis]], [[approximation theory]], [[set theory]], and [[probability theory]]. Much of his work was with discrete mathematics. He solved many unsolved problems. He challenged and worked on [[Ramsey theory]], a part of mathematics that is about the requirements for order to appear. His work involved solving open problems rather than developing new kinds of mathematics. Erdős published almost 1,500 articles in his life, the most of any mathematician<ref>{{Cite web|title=grossman - The Erdös Number Project|url=h