**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 known for his work in probability theory, though he also made contributions in combinatorics, graph theory, and number 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.

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 where 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. Rédei's proof of Hajós's theorem was simplified by Tibor Szele.

**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.

**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.

**Miklós Simonovits** is a Hungarian mathematician who currently works at the Rényi Institute of Mathematics in Budapest and is a member of the Hungarian Academy of Sciences. He is on the advisory board of the journal *Combinatorica*. He is best known for his work in extremal graph theory and was awarded Széchenyi Prize in 2014. Among other things, he discovered the method of progressive induction which he used to describe graphs which do not contain a predetermined graph and the number of edges is close to maximal. With Lovász, he gave a randomized algorithm using *O*(*n*^{7} log^{2}*n*) separation calls to approximate the volume of a convex body within a fixed relative error.

**András Prékopa** was a Hungarian mathematician, a member of the Hungarian Academy of Sciences. He was one of the pioneers of stochastic programming and has been a major contributor to its literature. He amended one of the three basic model types of the discipline, chance-constrained programming, by taking into account stochastic dependence among the random variables involved. One of his main results in the area concerns the convexity theory of probabilistically constrained stochastic optimization problems. He introduced the concept of logarithmic concave measures and provided several fundamental theorems on logconcavity, which supplied proofs for the convexity of a wide class of probabilistically constrained stochastic programming problems. These results had impact far beyond the area of mathematical programming, as they found applications in physics, economics, statistics, convex geometry and other fields.

**Jenő Szép** was a Hungarian mathematician, professor of University of Economics, Budapest. His main research interests were group theory and game theory. He was founder of the journal *Pure Mathematics and Applications* (PU.M.A.).

The **Hungarian Operations Research Society (HORS)** is the professional non-profit society for the scientific field of Operations Research in Hungary. The society is recognized by the International Federation of Operational Research Societies and its subgrouping, the Association of European Operational Research Societies, as the main national society for Operations Research in its country,

**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. He is the father of linguist András Kertész.

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

This page is based on this Wikipedia article

Text is available under the CC BY-SA 4.0 license; additional terms may apply.

Images, videos and audio are available under their respective licenses.

Text is available under the CC BY-SA 4.0 license; additional terms may apply.

Images, videos and audio are available under their respective licenses.