Lipót (or Leopold) Klug
Born	(1854-01-23)23 January 1854 Gyöngyös, Hungary
Died	24 March 1945(1945-03-24) (aged 91) Budapest, Hungary
Resting place	Kozma Street Cemetery 47°28′22″N 19°10′46″E / 47.47278°N 19.17944°E / 47.47278; 19.17944
Alma mater	University of Budapest
Parent(s)	Miksa Klug and Hani Neufeld
Scientific career
Fields	Mathematics
Institutions	Franz Joseph University

Lipót, or Leopold (in German), Klug (23 January 1854 – 24 March 1945) was a Jewish-Hungarian^[1] mathematician, professor in the Franz Joseph University of Kolozsvár.

Klug attended the gymnasium of his hometown and entered Eötvös Loránd University in 1872 where he graduated as docent in 1874.^[2] Between 1874 and 1893 he taught mathematics in the high school of Pozsony (now Bratislava in Slovakia). From 1893 to 1897 he was professor in a secondary school in Budapest and he obtained his habilitation in the university of Budapest. In 1897 he was appointed professor of geometry in the University of Kolozsvár.^[3] He retired in 1917 and moved back to Budapest.

He died in 1944 or 1945 in strange circumstances: in the middle of World War II and aged 91 years, he walked out of his home in Budapest and he never came back. Likely a victim of racial hate because he was of Jewish descent.^[4]

His work was greatly influenced by Gyula Kőnig. His areas of research were descriptive geometry and synthetic geometry.^[5] During his retirement in Budapest he encouraged the young Edward Teller (the father of the hydrogen bomb).

• List of unsolved deaths

• Kántor-Varga, T. (2006). "Biographies". In János Horváth (ed.). A Panorama of Hungarian Mathematics in the Twentieth Century. Springer. pp. 563–608. ISBN 3-540-28945-3.
• Oláh-Gál, Róbert (2009). "The Most Cited Hungarian Geometer of the Geometric Institution of the Technical University of Wien". Visual Mathematics: 1–6. ISSN 1821-1437.
• Szenkovits, Ferenc (2014). "Remarkable Hungarian mathematicians at the Cluj University". Studia Universitatis Babeş-Bolyai, Mathematica. 59 (4): 419–433. ISSN 2065-961X.

Wikimedia Commons has media related to Lipót Klug.

• O'Connor, John J.; Robertson, Edmund F., "Lipót Klug", MacTutor History of Mathematics Archive, University of St Andrews