have helped him in winning the lasting interest of so many younger men in his problems. In the same article Pólya writes about Fejér's style of mathematics: Fejér talked about a paper he was about to write up. 'When I write a paper,' he said, 'I have to rederive for myself the rules of differentiation and sometimes even the commutative law of multiplication.' These words stuck in my memory and years later I came to think that they expressed an essential aspect of Fejér's mathematical talent; his love for the intuitively clear detail. It was not given to him to solve very difficult problems or to build vast conceptual structures. Yet he could perceive the significance, the beauty, and the promise of a rather concrete not too large problem, foresee the possibility of a solution and work at it with intensity. And, when he had found the solution, he kept on working at it with loving care, till each detail became fully transparent. It is due to such care spent on the elaboration of the solution that Fejér's papers are very clearly written, and easy to read and most of his proofs appear very clear and simple. Yet only the very naive may think that it is easy to write a paper that is easy to read, or that it is a simple thing to point out a significant problem that is capable of a simple solution. See also Fejér kernel Fejér's theorem References External links Birthplace of Lipót Fejér. Further reading 1880 births 1959 deaths People from Pécs Hungarian Jews Approximation theorists 20th-century Hungarian mathematicians Members of the Hungarian Academy of Sciences Mathematical analysts Academic staff of Franz Joseph University Burials at Kerepesi Cemetery Austro-Hungarian mathematicians