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).

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.

[5] During his retirement in Budapest he encouraged the young Edward Teller (the father of the hydrogen bomb).