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Lecture 9: Reducibility
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Description: Quickly reviewed last lecture. Discussed the reducibility method to prove undecidability and T-unrecognizability. Defined mapping reducibility as a type of reducibility. Showed that \(E_\bf{TM}\) is undecidable and T-unrecognizable; \(EQ_\bf{TM}\) and \(\overline{EQ_\bf{TM}}\) are T-unrecognizable.
Instructor: Prof. Michael Sipser
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2020
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