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Carryless Arithmetic Mod 10 (1008.4633v2)
Published 27 Aug 2010 in math.NT
Abstract: We investigate what arithmetic would look like if carry digits into other digit position were ignored, so that 9 + 4 = 3, 5 + 5 = 0, 9 X 4 = 6, 5 X 4 = 0, and so on. For example, the primes are now 21, 23, 25, 27, 29, 41, 43, 45, 47, ... .
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