Focus

The Hungarian scholar Paul Erdo˝s (1913–1996) was one of the most remarkable mathematicians of the twentieth century. He never had a regular job and he never had a regular home. He just traveled from university to university, working with various mathematicians on a bewildering variety of problems. In the end, Erdo˝s wrote over 1500 mathematical papers, several books, and had over 500 collaborators (this author was one of them).