TURING, A. 4 ITEMS

i. "Some calculations of the Riemann zeta-function" [in:] Proceedings of the London Mathematical Society, series 3, vol. 3, no. 9, March 1953, pp.99-117. Oxford: Clarendon Press, 1953, original green printed wrappers, (bought from Yelm Books, Whitestone, 1999), [T&W T64; Origins of Cyberspace 938]ii. "The word problem in semi-groups with cancellation" [in:] Annals of Mathematics, second series, vol. 52., no. 2, September 1950, pp.491-505. Princeton: Princeton University Press, 1950, original wrappers, (ownership stamp of M.G.L. Meyer, University of Chicago; bought from Yelm Books, Whitestone, NY, 1999), [T&W T66], slightly brownediii. "A method for the calculation of the zeta-function" [from:] Proceedings of the London Mathematical Society, series 2, vol. 48, 1943, pp.180-197. Oxford: Clarendon Press, 1943, plain green wrappers, (bought from Dailey Rare Books, Los Angeles, 2006), [not in T&W]iv. "Solvable and unsolvable problems" [in:] Haslett, A.W., editor, Science News, vol. 31. London: Penguin Books, 1954, pp.7-23, original paper covers, preserved in cloth folding box, [T&W T63; Origins of Cyberspace 939]8vo

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