Lothar Berg (born 28 July 1930 in Stettin; died 27 July 2015 in Rostock) was a German mathematician and university teacher.
Lothar Berg graduated from high school in Neustrelitz in 1949 and then studied mathematics and physics at the University of Rostock. In 1953, he began a two-year postgraduate course at the University of Rostock. In 1955, he received his doctorate under and ("German: Allgemeine Kriterien zur Massbestimmung Linearer Punktmengen", English: General criteria for the measurement of linear point sets). Lothar Berg then went to the Technical University of Electrical Engineering in Ilmenau as a senior assistant (from 1958 as university lecturer).
From 1959 to 1965 Berg was a professor of mathematics at the University of Halle. From 1965 until his retirement in 1996 he was professor of analysis at the University of Rostock. He accompanied a large number of young mathematicians in their research work. His students included the later university teachers Karl-Heinz Kutschke, Manfred Taschen, and Dieter Schott.
Lothar Berg was a board member of the (English: Mathematical Society of the German Democratic Republic) from 1981 to 1990 and a member of the Leopoldina from 1970 until his death.
In 1973, he received the University Medal of the University of Jyväskylä, Finland, and the Second University Prize by the University of Rostock in 1978 as well as the Ehrenmedaille of the Mathematische Gesellschaft der Deutschen Demokratischen Republik, Berlin, in 1990. In 2005, he received the Golden DMV Plaquette by the German Mathematical Society.
Lothar Berg has also been listed as a noteworthy mathematics educator by Marquis Who's Who.
Since 27 May 1952, he was married to a co-translator of various Russian math books into German, Christa Berg née Jahncke. They had two children.