'Halt decidable' diaporamas de présentation

CS21 Decidability and Tractability

CS21 Decidability and Tractability. Lecture 11 February 1, 2019. Outline. Church-Turing Thesis decidable, RE, co-RE languages the Halting Problem reductions many-one reductions. Undecidability. decidable. decidable RE all languages our goal: prove these containments proper.

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Decidable and undecidable problems

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4. Decidability

4. Decidability. The diagonalization method The halting problem is undecidable co-HALT is unrecognizable. Undecidability. decidable. all languages. decidable ? RE ? all languages our goal: prove these containments proper. regular languages. context free languages. RE.

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