Exercise 4:

K    {py:  Mp(y)}\overline{K}\;\leq\;\{ p \mid \forall y:\;M_p(y){\uparrow} \}
Reduce K\overline{K} to the set of natural numbers such that the program codified by them does not halt with any input (roughly, the set of programs non-halting with any input), in order to prove that such set is not semi-decidable (not recursively enumerable).
Authors: Carles Creus, Guillem Godoy / Documentation:
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