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Philip D. Welch

Publications and source records attributed to Philip D. Welch.

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P^f is not equal to NP^f for almost all f

We discuss the question of Ralf-Dieter Schindler whether for infinite time Turing machines P^f = NP^f can be true for any function f from the reals into omega_1. We show that ``almost everywhere'' the answer is negative.

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