Person: Rédei, László
László Rédei was a Hungarian mathematician who worked on algebraic number theory and abstract algebra.
Mathematical Profile (Excerpt):
 In the following year he was awarded his doctorate but, before the award of his doctorate, Rédei had already become a secondary teacher of mathematics, taking up his first teaching appointment in 1921.
 For nearly twenty years Rédei worked as a secondary school teacher.
 By 1940, the year he moved from secondary school teaching to become a lecturer at Szeged University, Rédei had published over 35 papers on algebraic number theory, particularly on class groups of quadratic number fields.
 To understand how a vacancy occurred at the University in Szeged we need to look at the events which began while Rédei was undertaking research in Budapest.
 However Gyula SzokefalviNagy left the Bolyai Institute in Szeged and moved to Cluj, with Rédei becoming his replacement.
 In 1941 Rédei was appointed to the Chair of Geometry in Szeged but later he was appointed to the Chair of Algebra and Number Theory.
 Let us look now at Rédei's work on algebraic number theory.
 However, when Rédei started work on the problem there was no information on the size of the cyclic components.
 This was not the only problem concerning quadratic number fields which Rédei investigated over this period.
 There are actually 21 such fields but Rédei did not achieve this classification.
 The other two main areas to which Rédei contributed are group theory and semigroup theory.
 One of Rédei's most important contributions to semigroup theory is his proof that every finitely generated commutative semigroup is finitely presented.
 Let us mention other important books written by Rédei.
Born 15 November 1900, Rákoskeresztur, Budapest, Hungary. Died 21 November 1980, Budapest, Hungary.
View full biography at MacTutor
Tags relevant for this person:
Group Theory, Origin Hungary
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References
Adapted from other CC BYSA 4.0 Sources:
 O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive