'Turing recognizable' presentation slideshows

Computer Language Theory

Computer Language Theory. Chapter 3: The Church-Turing Thesis. Chapter 3.1. Turing Machines. Turing Machines: Context. Models Finite Automata: Models for devices with little memory Pushdown Automata:

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Complexity and Computability Theory I

Complexity and Computability Theory I. Lecture #14 Instructor: Rina Zviel-Girshin Lea Epstein. Formally: (Q, ?, ?, ?, q 0, q accept, q reject ). Q is the set of states. ? is the input alphabet _ ? ? . ? is the tape alphabet, _?? and ?? ?.

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CS 208: Computing Theory

CS 208: Computing Theory. Assoc. Prof. Dr. Brahim Hnich Faculty of Computer Sciences Izmir University of Economics. Computability Theory. Decidability. Motivation. Turing machines: a general purpose computer; Formalizes the notion of an algorithm (Church-Turing thesis)

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David Evans cs.virginia/evans

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CSE 105 theory of computation

CSE 105 theory of computation. Fall 2019 https://cseweb.ucsd.edu/classes/fa19/cse105-a/. Today's learning goals Sipser Ch 4.1, 4.2. Trace high-level descriptions of algorithms for computational problems.

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Computability

Computability. Review homework. Video. Variations. Definitions. Enumerators. Hilbert's Problem. Algorithms. Summary Homework: Give formal definition of enumerator. Homework. Describe TMs to recognize {ww | w a string in {0,1}* } {0 n 1 n | n>=0} {a n b n c n | n >= 0}

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INHERENT LIMITATIONS OF COMPUTER PROGRAMS

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More Turing Machines

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Intro to Theory of Computation

L ECTURE 12 Theory of Computation Turing Machines Turing Machine Variants. Intro to Theory of Computation. CS 464. Sofya Raskhodnikova. TM versus PDA. TM can both write to and read from the tape. The head can move left and right. The input does not have to be read entirely.

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Turing machines

Turing machines. Sipser 2.3 and 3.1 (pages 123-144). A Context-free Grammar for { a n b n c n | n ? 0} ?. Theorem 2.34 (Pumping lemma for CFLs ): If A is a CFL, then there is a number p where, if s is any string in A of length ? p , then s = uvxyz such that:

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Church-Turing Thesis

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CHAPTER 4 Decidability

CHAPTER 4 Decidability. Contents. Decidable Languages decidable problems concerning regular languages decidable problems concerning context-free languages The Halting Problem The diagonalization method The halting problem is undecidable A Turing unrecognizable languages.

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