'Halt tm' presentation slideshows

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????. ? 6 ? ???????????. REVIEW(20110328). ????. ?? : ????? ???? ?? , ?????? ???? . ?? : E TM , EQ TM , ??????? (PCP), ????????????? , ? . ?? : ?? + ?? ???? , ?? ?? , ????????. REVIEW(20110328). ?? : ???? ???? ?? , ?????? ???? . ?? : ???? B ???????? A ?? .

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Reducibility

Reducibility. http://cis.k.hosei.ac.jp/~yukita/. Theorem 5.1 HALT TM is undecidable. Theorem 5.2 E TM is undecidable. Proof continued. Theorem 5.3 REGULAR TM is undecidable. Continued Remark on Th. 5.3. Theorem 5.4 EQ TM is undecidable. Definition 5.5 Computation History.

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CS154, Lecture 8: Undecidability, Mapping Reductions

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Undecidable Problems From Language Theory

Undecidable Problems From Language Theory. Lecture 33 Section 5.1 Wed, Nov 7, 2007. Reducibility. A problem A is reducible to a problem B if a solution to B gives us a solution to A . More specifically, an instance of problem A can be restated as an instance of problem B .

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Undecidable Problems From Language Theory

Undecidable Problems From Language Theory. Lecture 33 Section 5.1 Wed, Nov 7, 2007. Reducibility. A problem A is reducible to a problem B if a solution to B gives us a solution to A . More specifically, an instance of problem A can be restated as an instance of problem B .

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CSCI 3130: Automata theory and formal languages

Fall 2010. The Chinese University of Hong Kong. CSCI 3130: Automata theory and formal languages. Reducibility. Andrej Bogdanov http://www.cse.cuhk.edu.hk/~andrejb/csc3130. Summary of last lecture. U. program ? M ?. accept , if M accepts w. reject , if M rejects w. input w.

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The Halting Problem

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INHERENT LIMITATIONS OF COMPUTER PROGRAMS

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CSCI 2670 Introduction to Theory of Computing

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Lecture 7 Undecidability cont.

Lecture 7 Undecidability cont. Jan Maluszynski , IDA, 200 7 http://www.ida.liu.se/~janma. Outline. (Sipser 5.1,5.3, 6.2) Reducibility Examples of undecidable problems Mapping reducibility Decidability of Logical Theories. Reduction techniques. For proving B is undecidable

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Reducibility

Giorgi Japaridze Theory of Computability. Reducibility. Episode 3. 3.1.a. Giorgi Japaridze Theory of Computability. The undecidability of the halting problem. Let HALT TM = {<M,w> | M is a TM and M halts on input w } HALT TM is called the halting problem.

310 views • 10 slides