Download e-book for iPad: Alan Turing: The Enigma The Centenary Edition by Andrew Hodges, Douglas Hofstadter

By Andrew Hodges, Douglas Hofstadter

ISBN-10: 069115564X

ISBN-13: 9780691155647

It is just a mild exaggeration to assert that the British mathematician Alan Turing (1912-1954) stored the Allies from the Nazis, invented the pc and synthetic intelligence, and expected homosexual liberation through decades--all ahead of his suicide at age 41. This vintage biography of the founding father of machine technological know-how, reissued at the centenary of his start with a considerable new preface via the writer, is the definitive account of a rare brain and existence. A gripping tale of arithmetic, pcs, cryptography, and gay persecution, Andrew Hodges's acclaimed publication captures either the internal and outer drama of Turing's existence. Hodges tells how Turing's progressive proposal of 1936--the proposal of a common machine--laid the basis for the fashionable machine and the way Turing introduced the assumption to sensible recognition in 1945 along with his digital layout. The ebook additionally tells how this paintings was once without delay concerning Turing's prime function in breaking the German Enigma ciphers in the course of global battle II, a systematic triumph that was once serious to Allied victory within the Atlantic. while, this is often the tragic tale of a guy who, regardless of his wartime provider, was once finally arrested, stripped of his protection clearance, and compelled to suffer a humiliating remedy program--all for attempting to stay in truth in a society that outlined homosexuality as a criminal offense.

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The Wards were not the sort of people who dropped diamond rings in the street. Colonel Ward, ultimately kindly, was remote and gruff as God the Father. Mrs Ward believed in bringing up boys to be real men. Yet there was a twinkle in her eye and both boys became fond of ‘Grannie’. In between lay Nanny Thompson, who ruled the nursery which was the boys’ proper place, and the governess of the schoolroom. There were other children in the house, for the Wards had no fewer than four daughters of their own, as well as another boy boarder.

Mrs Turing also pressed on with her water-colours, for which she enjoyed a definite talent. She took Alan out on her sketching parties where, with big eyes and sailor hat, and with quaint expressions of his own like ‘quockling’ for the screech of seagulls, he delighted the lady art students. Alan taught himself to read in about three weeks from a book called Reading without Tears. He was quicker, however, to recognise figures, and had an infuriating habit of stopping at every lamp post to identify its serial number.

As narrator I adopted a standpoint of a periscope looking just a little ahead of Alan Turing’s submerged voyage, punctuated by just a few isolated moments of prophecy. The book bears in mind that what is now the past, the 1940s and 1950s, was once the completely unknown future. This policy required an unwarranted confidence that readers would wade through the pettier details of Alan Turing’s family origins and early life, before being given any reason why this life had any significance. But it has had the happy outcome that the text has not dated as do texts resting on assertions about ‘what we know now’.

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Alan Turing: The Enigma The Centenary Edition by Andrew Hodges, Douglas Hofstadter

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