Đuro Kurepa
He lectured at universities across Europe, as well as those in Canada, Cuba, Iraq, Israel, and the United States, and was quoted saying "I lectured at almost each of [the] nineteen universities of [the former] Yugoslavia..."[1] Born as Đurađ Kurepa in Majske Poljane, Kingdom of Croatia-Slavonia, Austria-Hungary to a Serb[4] family.Kurepa then went to the Collège de France and the University of Paris, where he received his doctoral diploma in 1935; his advisor was French mathematician Maurice René Fréchet, and his thesis was titled Ensembles ordonnés et ramifiés.[7] In 1965, Kurepa shifted to the University of Belgrade, where he focused on the mathematical fields of logic and set theory.[1] He published his scientific works in the most notable European and world scientific journals, including: Mathematische Annalen, Izvestiya Akademii nauk SSSR, Fundamenta Mathematicae, Acta Mathematica, Comptes rendus de l'Académie des Sciences, Bulletin de la Société Mathématique de France, Zeitschrift für mathematische Logik und Grundlagen der Mathematik, Journal of Symbolic Logic, Pacific Journal of Mathematics.According to the Mathematics Genealogy Project, Kurepa supervised 27 students, including analytic number theorist Aleksandar Ivić, set theorist Stevo Todorčević and topologist Ljubisa D.R.