Undecidability - PowerPoint PPT Presentation


Understanding the Limits of Computation in CMSC.281 Undecidability

Exploring the concept of undecidability in computing, we delve into the question of whether there are tasks that cannot be computed. The journey leads us to the theorem that the language ATM, defined as containing Turing Machine descriptions accepting input strings, is undecidable, showcasing the fu

0 views • 14 slides


Challenges of Unbounded Program Analysis

Verifying unbounded programs poses challenges due to the undecidability of certain computational resources like memory usage, execution time, and data structures. The presence of infinite execution paths, unbounded loops, recursion, and dynamic memory allocation makes it difficult to determine progr

0 views • 32 slides



Understanding the Halting Problem in CS Theory

Delve into the intricacies of the Halting Problem and its undecidability in computer science theory. Learn about the concepts of decidable and undecidable languages, the implications of the Halting Problem on computing, and explore the proof that demonstrates the undecidability of HALT.

0 views • 24 slides


Theory of Computation Winter 2022: Learning Goals and Key Concepts

Explore the key concepts in the Theory of Computation for Winter 2022, including decision problems, reductions, undecidability, and the relationship between HALTTM and ATM. Learn about decidable, recognizable, and undecidable problems as well as the importance of reductions in proving undecidability

0 views • 27 slides


Understanding Reductions in Decidability and Tractability

Exploring the concepts of reductions, particularly many-one reductions, in the context of decidability and tractability. The lecture delves into the relationship between decidable and undecidable problems, highlighting examples like Rice's Theorem. It explains the definitions and implications of red

0 views • 20 slides


Undecidability Consequences and Other Problems in Computer Science

Explore the undecidability of the Acceptance Turing Machine (ATM) and its implications in recognizing languages, including the relationship between decidability and recognizability. Discover the undecidability of the Halting Problem and its significance in computational theory.

0 views • 10 slides


Undecidability and Reductions in Theory of Computation

Explore the undecidability of the halting problem and ATM, using reductions to show their non-decidability. Discover how problems are reduced from A to B in computation theory, enabling the solution of one problem by solving another.

0 views • 30 slides


Understanding Recursive and Recursively Enumerable Languages

Exploring the concepts of decidability and undecidability in computer science, specifically focusing on Recursive and Recursively Enumerable (RE) languages. Recursive languages always halt, while RE languages may or may not halt, showcasing the differences between decidable and undecidable problems.

0 views • 35 slides


Undecidability in Rectangular Hybrid Automata Analysis

The undecidability of the reachability analysis in rectangular hybrid automata (RHA) poses challenges for verifying cyber-physical systems. This complexity was demonstrated through a reduction from the Halting problem of two counter machines by Henzinger et al. Additionally, the review of computabil

0 views • 15 slides


Understanding Reductions in Theoretical Computer Science

Explore the concept of reductions in theoretical computer science, where problems are converted into others allowing solutions to one to solve the other. Learn how reductions can prove languages to be undecidable using examples like ATM and HALTTM. Follow along as we discuss the application of reduc

0 views • 38 slides


Undecidability Proofs and Reductions in Theory of Computation

Explore undecidability proofs and reductions in the context of Theory of Computation through examples and explanations. Understand how problems are reduced to show undecidability, with demonstrations involving Turing Machines and languages. Gain insights into proving statements like the undecidabili

0 views • 21 slides


Understanding Complexity Theory: Decidability, Undecidability, and Reductions

Explore the concepts of decidability and undecidability in complexity theory, discussing the proof of undecidability for various languages. Learn about the acceptance problem and reductions, including mapping reductions, to relate and solve different computational problems effectively.

0 views • 14 slides


Exploring Theory of Computation: Undecidability and Counting Arguments

Dive into the world of theory of computation with a focus on undecidability, counting arguments, and examples of non-Turing recognizable languages. Discover the intricacies of proving problems as undecidable and delve into the concepts of Turing-recognizable sets and deciders for complex computation

0 views • 22 slides