X+Y, released in the US as A Brilliant Young Mind, is a 2014 British drama film directed by Morgan Matthews and starring Asa Butterfield, Rafe Spall and Sally Hawkins. The film, inspired by the documentary Beautiful Young Minds, focuses on a teenage English mathematics prodigy named Nathan (Asa Butterfield) who has difficulty understanding people, and is autistic, but finds comfort in numbers. When he is chosen to represent the United Kingdom at the International Mathematical Olympiad (IMO), Nathan embarks on a journey in which he faces unexpected challenges, such as understanding the nature of love. The character of Nathan was based on Daniel Lightwing who won a silver medal at the 2006 IMO. The film premiered at the Toronto International Film Festival on 5 September 2014. The European premiere was at the BFI London Film Festival on 13 October 2014, and the UK cinema release was on 13 March 2015. Plot Nathan Ellis, a 9 year old maths prodigy, has just lost his father in a car accident. Nathan is diagnosed as being on the autism spectrum early in the film, and his father was the only one who was able to connect normally with him. Although Nathan values his mother, Julie, he shuns any physical contact with her and treats her as more of a caretaker than a parent. Wanting to make sure Nathan is not distracted from his studies, Julie enrolls him in advanced classes at a new school (filmed at High Storrs School in Sheffield, United Kingdom). There, he comes under the tutelage of teacher Martin, also a math genius, who has multiple sclerosis. Martin sees himself in Nathan, once a promising young mind in the field of mathematics, who gave it all up once he was diagnosed with his illness. Seven years later, Martin is preparing Nathan to compete for a place in the International Mathematical Olympiad, a prestigious high school competition consisting of the world's best young mathematicians. This year, it is to be held at Cambridge, after a two-week math camp in Taiwan where the students will study for the test that determines the winners. Nathan fears he is not good enough to qualify but ends up doing well enough to accompany 15 other British teenagers to Taiwan. Suddenly thrust out of his comfort zone, Nathan finds himself no longer the smartest maths whiz in the room, and his social anxieties nearly paralyse his