questions which were of his most interests and examinations. His bibliography includes 33 units, from which 30 are scientific treatises and had been published among the others in a magazines such as: Monatshefte für Mathematik und Physik, "Sitzungsberichte der kaiserlichen Akademie der Wissenschaften"; in Vienna, "Jahresbericht der deutschen Mathematikervereinigung", "https://www.gdnae.de/" in Verhandlungen, "Bulletin des Sciences Mathematiques", "Obzornik za matematiko in fiziko" and "Publications mathematiques de l'Universite de Belgrade". When French mathematician Charles Émile Picard denoted Plemelj's works as "deux excellents memoires", Plemelj became known in the mathematical world. Plemelj was a regular member of the SAZU since its foundation in 1938, corresponding member of the JAZU (Yugoslav Academy of Sciences and Arts) in Zagreb, Croatia since 1923, corresponding member of the SANU (Serbian Academy of Sciences and Arts) in Belgrade since 1930 (1931). In 1954, he received the highest award for research in Slovenia, the Prešeren award. The same year he was elected for corresponding member of the Bavarian Academy of Sciences in Munich. In 1963, for his 90th anniversary, University of Ljubljana granted him title of the honorary doctor. Plemelj was first teacher of mathematics at Slovene university and 1949 became first honorary member of the ZDMFAJ (Yugoslav Union of Societies of Mathematicians, Physicists, and Astronomers). He left his villa in Bled to the DMFA, where today is his memorial room. Plemelj did not do extra preparation for lectures; he didn't have any notes. He used to say that he thought over the lecture subject on the way from his home in Gradišče to the University. Students are said to have got the impression that he was creating teaching material on the spot and that they were witnessing the formation of something new. He was writing formulae on the table beautifully although they were composited from Greek, Latin or Gothic letters. He requested the same from students. They had to write distinctly. Plemelj had a very refined ear for languages and created a solid base for the development of Slovene mathematical terminology. He had accustomed students for a clear and logical phraseology. For example, he would become angry if they used the word rabiti 'to use' instead of the word potrebovati 'to need'. For this reason he said: "The engineer who does not know mathematics never needs it. But if he knows it, he uses it frequently." See also List of Slovenes Slovene mathematicians Hilbert's twenty-first problem References Sources