In mathematics, the lines of a 3-dimensional projective space, S, can be viewed as points of a 5-dimensional projective space, T. In that 5-space, the points that represent each line in S lie on a quadric, Q known as the Klein quadric. If the underlying vector space of S is the 4-dimensional vector space V, then T has as the underlying vector space the 6-dimensional exterior square Λ2V of V. The line coordinates obtained this way are known as Plücker coordinates. These Plücker coordinates satisfy the quadratic relation p 12...

I'm All Right Jack is a 1959 British comedy film directed and produced by John and Roy Boulting from a script by Frank Harvey, John Boulting and Alan Hackney based on the 1958 novel Private Life by Hackney.The film is a sequel to the Boultings' 1956 film Private's Progress and Ian Carmichael, Dennis Price, Richard Attenborough, Terry-Thomas and Miles Malleson reprise their characters. Peter Sellers played one of his best-known roles, as the trades union shop steward Fred Kite and won a BAFTA Best Actor Award. The rest of the cast included many well-known British comedy actors of the time.The film...