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Sep 27, 2010 at 21:47 comment added slimton This is meant to be a comment on Kristoffer's answer below but I don't have enough reputation to place it there. The comment is that it seems to me that the tape-compression theorem, which you invoke to turn every machine to one with a single work-tape and a fixed alphabet, works precisely by increasing the alphabet or the number of work-tapes; or does it?
Sep 26, 2010 at 8:21 history answered slimton CC BY-SA 2.5