Klaus Roth

Klaus Friedrich Roth (29 October 1925 – 10 November 2015) was a German-British mathematician. He was known for his work on diophantine approximation, the large sieve, and irregularities of distribution. 
Early life.
He was born in Breslau, Prussia. He studied at St Paul's School in London from 1939 to 1943 and then attended Cambridge University, graduating from Peterhouse, Cambridge in 1945. In 1946 he began research at University College London, under the supervision of Theodor Estermann.
Career.
He became a professor at University College London in 1961, and moved to a chair at Imperial College London in 1966, a position he held until official retirement in 1988. He then remained at Imperial College as Visiting Professor until 1996.
Death.
Roth died in Iverness, Scotland on 10 November 2015 at the age of 90.