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2 Theory of Computation Which of the following sets are recursive? Which are r.e.? Which have r.e. complement? (a) {x:x cE.}, (b) (x:x is a

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2 Theory of Computation

Which of the following sets are recursive? Which are r.e.? Which have r.e. complement? (a) {x:x cE.}, (b) (x:x is a perfect square}, (c) {x:0, is injective}, (d) {x: there is a run of at least x consecutive 7s in the decimal a

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