Marcel Riesz (November 16, 1886 – September 4, 1969) was a Hungarian mathematician who was born in Győr, Hungary (Austria-Hungary). He moved to Sweden in 1908 and spent the rest of his life there, dying in Lund, where he was a professor from 1926 at Lund University. He was known for work on classical analysis, on fundamental solutions of partial differential equations, on divergent series, Clifford algebras, and number theory.
Riesz was elected a member of Royal Swedish Academy of Sciences in 1936.
He was the younger brother of the mathematician Frigyes Riesz.
* Riesz theorem
* O'Connor, John J.; Robertson, Edmund F., "Marcel Riesz", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Riesz_Marcel.html .