Felix Christian Herbert Iversen (22 October 1887 – 31 July 1973) was a Finnish mathematician[1] and a pacifist.[2] He was a student of Ernst Lindelöf, and later an associate professor of mathematics at the University of Helsinki. Although he stopped performing serious research in mathematics around 1922, he continued working as a professor until his retirement in 1954 and published a textbook on mathematics in 1950.[1] The Soviet Union awarded Felix Iversen the Stalin Peace Prize in 1954.[3]