- Sir David Lean CBE (25 March 1908 – 16 April 1991) was an English film director, producer, screenwriter, and editor, widely considered one of the most important figures of British cinema. He directed the large-scale epics The Bridge on the River Kwai (1957), Lawrence of Arabia (1962), Doctor Zhivago (1965), Ryan’s Daughter (1970), and A Passage to India (1984). He also directed the film adaptations of Charles Dickens novels Great Expectations (1946) and Oliver Twist (1948), as well as the romantic drama Brief Encounter (1945).
- Riemann hypothesis (Wikipedia)
In mathematics, the Riemann hypothesis is the conjecture that the Riemann zeta function has its zeros only at the negative even integers and complex numbers with real part 1/2. Many consider it to be the most important unsolved problem in pure mathematics. It is of great interest in number theory because it implies results about the distribution of prime numbers. It was proposed by Bernhard Riemann (1859), after whom it is named.