
György Alexits (1899–1978) Member of the Academy, Kossuth Prize (1951), State Award (1970)
He was mainly interested in real functions. His most important results are in the field of Fourier analysis and approximation theory. He was at the Institute between 1971 and 1974.

László Alpár (1914–1991) Doctor of Science (1978)
He worked in analysis. His main results deal with the behaviour of analytic functions on the circle of convergence. At the Institute between 1956 and 1984, he also served as Deputy Director.



András Békéssy (1925) Doctor of Science, Deputy director (1964–1971), Academy Award (1984)
He is interested in applications of complex analysis, in combinatorics and in probability theory. He has worked for WHO, and has written a book about databases (together with János Demetrovics). He worked at the Institute between 1964 and 1971.

Imre Bihari (1915–1999) Doctor of Science (1979)
His main field of interest was differential equations. At the Institute between 1962 and 1985, he initiated the study of semilinear differential equations.



Ákos Császár (1924) Member of the Academy, Kossuth Prize (1963)
His main interests are in real analysis and in general topology; he is the author of comprehensive textbooks on both subjects. His most important result is the unification of different topological structures by introducing syntopogenous structures. Though never a fulltime member, he has been actively taking part of the Institute’s life for decades now.

Jenő Egerváry (1891–1958) Member of the Academy, Kossuth Prize (1949, 1953)
He was the leader of the research group at the Technical University of Budapest, the predecessor of the Institute. He has obtained outstanding results in numerical optimization. He has also worked on the threebody problem, but his most significant result is the EgerváryKőnig theorem about 01 matrices.



Árpád Elbert (1939–2001) Doctor of Science (1989)
His main interest was in differential equations, where he managed, among other things, to relax the conditions needed for solving semilinear differential equations. He worked at the Institute from 1963 until his untimely death.

Paul Erdős (1913–1996) Member of the Academy, member of six foreign Academies, Wolf Prize (1984), Kossuth Prize (1958), State Award (1983), Gold medal of the Academy (1991)
With over 1500 papers he is, after Euler, the most prolific mathematician of all times. He worked intensively in number theory, and gave, together with Atle Selberg, the first elementary proof for the prime number theorem. In approximation theory, he proved the almost everywhere divergence of Langrange interpolation (jointly with P. Vértesi). He opened new fields in set theory, as, for example, partition theory (jointly with Richard Rado). His ideas and results also had an essential impact on discrete geometry. During the second half of his life he turned to combinatorics, where, among other things, he developed the probabilistic method. In his whole life he wandered from conference to conference and research center to research center. He was invited to lecture all over the world from Princeton to Beijing. He raised numerous famous open problems, by means of which he created entire schools in several branches of mathematics. He was officially a member of the Institute from 1972 until his death.



László Fejes Tóth (1915) Member of the Academy, foreign member of four foreign Academies, Director of the Institute (19701982), Kossuth Prize (1957), State Award (1973), Gauss memorial medal (1974), Gold Medal of the Academy (2001).
During the 1940s and 1950s, his results created a new branch of mathematics: discrete geometry. Within this field, he obtained significant results concerning extremal properties of polyhedra. He solved the 2dimensional case of the sphere packing problem (part of Hilbert’s Problem 18). The influence of his books as well as his ability to pose interesting problems created a school around him reaching as far as the US. He was a regular organizer of Oberwolfach conferences. He worked at the Institute from 1965 until his retirement in 1983.

Géza Freud (1922–1979) Doctor of Science, Kossuth Prize (1959).
He was a worldwide recognized expert on orthogonal polynomials and wrote a monograph on the subject. Several of his theorems are starting points for presentday research. He developed the theory of onesided polynomial approximation. A founder of weighted approximation, he introduced a class of weights which now bears his name. He emigrated in 1974, after 20 years spent at the Institute.



Tibor Gallai (1912–1992) Corresponding member of the Academy, Kossuth Prize (1956), Academy Award (1972)
He achieved his most important results in elementary combinatorial problems and graph theory. He played a key role in creating the Hungarian school in combinatorics. He worked at the Institute between 1958 and 1968.

György Grätzer (1936) External member of the Academy
He is an authority in lattice theory and universal algebra. His 200 papers and books (among them Universal Algebra and General Lattice Theory) have had a great impact on the developments of these topics. He was a member of the Institute between 1958 and 1964.

Endre Makai (1915–1987) Doctor of Science (1955), State Award (1973), Academy Award (1970).
He worked in analysis, mostly on Fourier series and differential equations. His research in applications to engineering, especially the description of the eigenoscillation of membranes, is also important. He was at the Institute between 1962 and 1980.



András Prékopa (1929) Member of the Academy, Széchenyi Award (1996)
He has not only founded the Hungarian operation research school, but has also developed it to acquire international fame. The Prékopa inequality for real functions is the starting point of several profound inequalities. Though a fulltime member of the Institute only in 1957/58, he conducted a group of operation research here for many years

László Rédei (1900–1980) Member of the Academy, Kossuth Prize (1950, 1955)
After obtaining significant results in algebraic number theory, he switched to group theory, where his research culminated in important results on factorizability of groups. He developed the theory of lacunary polynomials that later became important in combinatorics. Author of an important textbook on Algebra and several research monographs, on finite pgroups, semigroups and the foundations of geometry. Though he was very active at the Institute from the 1960’s, he was a fulltime member only towards the end of his life (1971–74).



Károly Sarkadi (1914–1985) Doctor of Science, State Award (1966)
One of the pioneers of Hungarian statistics. He developed an exact statistical method for checking Gaussian distribution which, apart form its theoretical significance, can also be successfully applied in practice. He worked at the Institute between 1952 and 1984.

János Surányi (1918) Doctor of Science (1957)
His main areas of interest are logic, number theory and didactics. Together with P. Erdős, he wrote the muchcited textbook Topics in Number Theory. He is also widely known as editor of the Hungarian Problem Book, based on the problems of mathematical competitions for secondary schools. Though never a formal member, he conducted a seminar on didactics at the Institute for a long time.



Árpád Szabó (1913–2002), Member of the Academy
His original field of interest was ancient Greek culture. Persecuted for political reasons, he found shelter at the Institute in 1958, where he remained until his retirement in 1983. It is while working here that he became a worldwide respected authority on Greek mathematics. Author of a great number of books, many of which have been translated into various foreign languages.

Károly Szilárd (1901–1980) Doctor of Science
His main areas of interest were differential equations and their applications. He has obtained fundamental results about ballistics. He was awarded the Stalin Prize for work done in this area while he was a prisoner of war in the Soviet Union.



Béla SzőkefalviNagy (1913–1998) Member of the Academy, Kossuth Prize (1950, 1953), State Award (1978), Gold medal of the Academy (1987)
As the worthy heir of Frigyes Riesz, he was the leader of the Hungarian functional analysis and operator theory school. Author of several monographs, among which the most famous one is his Leçons d’analyse fonctionnelle written jointly with his master F. Riesz, a fundamental textbook translated into six languages. Though never a fulltime member of the Institute, he is the founder of the research group in analysis.

Lajos Takács (1924)
He initiated a new line of applying combinatorial enumeration in the theory of stochastic processes and was one of the pioneers of queuing theory. Author of several research monographs, among which the influential Combinatorial methods in the theory of stochastic processes. He entered the Institute in 1955 and worked here until his emigration in 1958.

Pál Turán (1910–1976) Member of the Academy, Kossuth Prize (1949, 1952)
Founder of the Hungarian analytic number theory school, he also achieved farreaching results in approximation theory, in complex analysis and in graph theory. His famous method of power sums by which he obtained results related to the Riemann Hypothesis is exposed in his book On a new method in analysis and its applications, published in German and English. He had a number of students around the world. Though active at the Institute for decades, he became a fulltime member only in 1975, a year before his untimely death.



Ottó Varga (1909–1969) Member of the Academy, Kossuth Prize (1952)
He obtained important results in differential geometry, especially concerning the foundations and the characterization of Finsler spaces. He spent the two last years of his life at the Institute.

István Vincze (1912–1999) Doctor of Science (1972), State Award (1966), Deputy director (19501964)
He obtained basic results in mathematical statistics and its applications and wrote a monograph on the subject. He worked at the Institute from its foundation until 1982.

