One of the world's foremost mathematicians, Prof Sir Michael Atiyah, has died at the age of 89, BBC reports.
Sir Michael, who worked at Cambridge University before he retired, made outstanding contributions to geometry and topology.
Sir Michael was a recipient of the highest honour in mathematics, a Fields Medal. He died on Friday.
His brother Joe told BBC News he had been one of the most important mathematicians of the 20th Century.
"He has been described to me by more than one professor of mathematics as the best mathematician in this country since Sir Isaac Newton," Mr Atiyah said.