**Tibor Szele** (Debrecen, 21 June 1918 – Szeged, 5 April 1955) Hungarian mathematician, working in combinatorics and abstract algebra. After graduating at the Debrecen University, he became a researcher at the Szeged University in 1946, then he went back at the Debrecen University in 1948 where he became full professor in 1952. He worked especially in the theory of Abelian groups and ring theory. He generalized Hajós's theorem. He founded the Hungarian school of algebra. Tibor Szele received the Kossuth Prize in 1952.

**János Bolyai** or **Johann Bolyai**, was a Hungarian mathematician, who developed absolute geometry—a geometry that includes both Euclidean geometry and hyperbolic geometry. The discovery of a consistent alternative geometry that might correspond to the structure of the universe helped to free mathematicians to study abstract concepts irrespective of any possible connection with the physical world.

**Alfréd Rényi** was a Hungarian mathematician who made contributions in combinatorics, graph theory, number theory but mostly in probability theory.

**Pál Turán** also known as Paul Turán, was a Hungarian mathematician who worked primarily in extremal combinatorics. He had a long collaboration with fellow Hungarian mathematician Paul Erdős, lasting 46 years and resulting in 28 joint papers.

**Dénes Kőnig** was a Hungarian mathematician of Jewish heritage who worked in and wrote the first textbook on the field of graph theory.

**László Lovász** is a Hungarian mathematician, best known for his work in combinatorics, for which he was awarded the Wolf Prize and the Knuth Prize in 1999, and the Kyoto Prize in 2010. He was the president of the Hungarian Academy of Sciences between 2014 and 2020. He served as president of the International Mathematical Union between January 1, 2007 and December 31, 2010.

Professor **Sándor Csörgő** was a Hungarian mathematician, and a professor at the University of Szeged.

In group theory, **Hajós's theorem** states that if a finite abelian group is expressed as the Cartesian product of simplexes, that is, sets of the form {*e*,*a*,*a*^{2},...,*a*^{s-1}} where *e* is the identity element, then at least one of the factors is a subgroup. The theorem was proved by the Hungarian mathematician György Hajós in 1941 using group rings. Rédei later proved the statement when the factors are only required to contain the identity element and be of prime cardinality.

**János Kollár** is a Hungarian mathematician, specializing in algebraic geometry.

**András Frank** is a Hungarian mathematician, working in combinatorics, especially in graph theory, and combinatorial optimisation. He is director of the Institute of Mathematics of the Eötvös Loránd University, Budapest.

* Publicationes Mathematicae Debrecen* is a Hungarian mathematical journal, edited and published in Debrecen, at the Mathematical Institute of the University of Debrecen. It was founded by Alfréd Rényi, Tibor Szele, and Ottó Varga in 1950. The current editor-in-chief is Lajos Tamássy.

**Vera T. Sós** is a Hungarian mathematician, specializing in number theory and combinatorics. She was a student and close collaborator of both Paul Erdős and Alfréd Rényi. She also collaborated frequently with her husband Pál Turán, the analyst, number theorist, and combinatorist. Until 1987, she worked at the Department of Analysis at the Eötvös Loránd University, Budapest. Since then, she has been employed by the Alfréd Rényi Institute of Mathematics. She was elected a corresponding member (1985), member (1990) of the Hungarian Academy of Sciences. In 1997, Sós was awarded the Széchenyi Prize.

**Albert Kónya** was a Hungarian physicist and politician, who served as Minister of Education between 1956 and 1957. He graduated in the József Attila University of Szeged. He fought in the Second World War from 1942 until the war's end. He was a prisoner of war for a short time in 1945. After the war he taught in the Budapest University of Technology and Economics. From 1950 he served as head of the Physics Department of the University of Miskolc. After that, in 1951 he became dean of the Faculty of Mechanics.

**Gábor Halász** is a Hungarian mathematician. He specialised in number theory and mathematical analysis, especially in analytic number theory. He is a member of the Hungarian Academy of Sciences. Since 1985, he is professor at the Eötvös Loránd University, Budapest.

**Bolyai Institute** is the mathematics institute of the Faculty of Sciences of the University of Szeged, named after the Hungarian mathematicians, Farkas Bolyai, and his son János Bolyai, the co-discoverer of non-Euclidean geometry. Its director is László Zádori. Among the former members of the institute are Frigyes Riesz, Alfréd Haar, Rudolf Ortvay, Tibor Radó, Béla Szőkefalvi-Nagy, László Kalmár, Géza Fodor.

**András Prékopa** was a Hungarian mathematician, a member of the Hungarian Academy of Sciences.

**Gábor Korchmáros** is a Hungarian mathematician, who works on finite geometry.

**Péter Pál Pálfy** is a Hungarian mathematician, working in algebra, more precisely in group theory and universal algebra. He serves as the director of the Alfréd Rényi Institute of Mathematics of the Hungarian Academy of Sciences since 2006.

**Andor Kertész** was a Hungarian mathematician and professor of Mathematics at the Lajos Kossuth University (KLTE), Debrecen. Ha is the father of linguist András Kertész.

A panorama of Hungarian Mathematics in the Twentieth Century, p. 601.

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