we knoe
also we know
for example if A be any arbitrary r.e set. can we always Necessarily the following is TRUE ? (always) any description is good. (bar sign means complement)
2026-03-26 02:25:23.1774491923
Recursive Set Challenge
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Every r.e. set is many-one reducible to the halting set $K$. That fact, together with the theorem you cited, immediately implies an affirmative answer to your question.