Special issue in honour of Jenő Egerváry

Abstract

) was a prominent scientist of pure and applied mathematics. He is best known for his contribution to the Hungarian method. However, his research activity included much more than that and he obtained many important and genuine results in other areas of mathematics and its applications. He was also an outstanding teacher and a key person of Hungarian applied mathematics until 1958, when he committed suicide. This was the aftermath of the 1956 revolution of Hungary with a harsh oppression. Not long after Egerváry's death, his research department was dissolved and by the early seventies he and his results were rarely mentioned in mathematical circles apart from his relation to the Hungarian method. At the end of the eighties his linear algebra related research came into light due to its connection T. Csendes (B)

On the number of roots for harmonic trinomials

“…The professor Jenő Egérvary was a prominent Hungarian mathematician who did important contributions in several areas of mathematics such as: algebraic equations, analysis, combinatorics, differential equations, function theory, geometry, matrix theory and its applications, optimization, theoretical physics, theory of determinants. We refer to [19,49,50,52] for beautiful historical reviews of the life and the wide-ranging list of the scientific works, lectures notes and miscellaneous papers of J. Egérvary. In particular, his works together with the works of the Hungarian mathematician Dénes Kőnig were very important in the solution of the so-called assignment problem in combinatorial optimization, which was solved by the American mathematician Harold William Kuhn in [34].…”