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Jul 8, 2010 at 20:43 vote accept Hans
Jul 8, 2010 at 19:45 comment added Matthew Daws I got confused for a moment, until I saw that Hans's function have domain the natural numbers! So $|y-x|\geq 1$ is just $x\not=y$. So, yeah, Lipschitz it is.
Jul 8, 2010 at 19:13 history answered Autumn Kent CC BY-SA 2.5