Lipót Fejér

lived from 1880 to 1959

Fejér's main work was in harmonic analysis working on Fourier series and their singularities. Fejér collaborated to produce important papers with Carathéodory on entire functions and with Riesz on conformal mappings.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Fejer.html