Born: January 22, 1880 in Györ, now Hungary
Died: February 28, 1956
in Budapest, Hungary.
Riesz was a founder of functional analysis, a topic
with many applications
in physics. His work in 1910 marks the start of operator theory.
At a conference in the back: Riesz, Kerékjártó,
Haar, Kõnig, Ortvay.
Seated: Kürschak, Birkhoff, Kellos, Fehér
Front row: Radó, Lipka, Kalmár, Szász