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CS 21 Decidability and Tractability Winter 2024 Out: January 10 Due: January 17 Problem Set 1 Copyright By PowCoder代写 加微信 powcoder Reminder: you are encouraged to work in groups of two or three; however you must turn in your own write-up and note with whom you worked. You may consult the course notes and the […]

CS21 Decidability and Tractability Lecture 13 February 2, 2024 • reductions • many-one reductions • undecidable problems Copyright By PowCoder代写 加微信 powcoder – computation histories – surprising contrasts between decidable/undecidable • Rice’s Theorem February 2, 2024 CS21 Lecture 13 2 Definition of reduction • Can you reduce co-HALT to HALT? • We know that HALT

CS 21 Decidability and Tractability Winter 2024 Posted: February 1 Solution Set 3 If you have not yet turned in the Problem Set, you should not consult these solutions. Copyright By PowCoder代写 加微信 powcoder A 2-NPDA is a 7-tuple (Q,Σ,Γ1,Γ2,δ,q0,F), where Q,Σ,Γ1,Γ2 and F are all finite sets, and • Q is the set of

CS 21 Decidability and Tractability Winter 2024 Posted: March 6 Solution Set 7 If you have not yet turned in PS7, you should not consult these solutions. Copyright By PowCoder代写 加微信 powcoder 1. To see that the language is in NP, we simply note that a witness for an n-symbol input y is the unique

CS 21 Decidability and Tractability Winter 2024 Posted: February 21 Solution Set 5 If you have not yet turned in the Problem Set, you should not consult these solutions. Copyright By PowCoder代写 加微信 powcoder 1. (a) We will reduce 2-COLORABLE to 2-SAT, which we showed to be in P. Given a graph G, our reduction

CS21 Decidability and Tractability Lecture 2 January 5, 2024 Terminology • finite alphabet Σ : a set of symbols Copyright By PowCoder代写 加微信 powcoder • language L ⊆ Σ∗: subset of strings over Σ • a machine takes an input string and either – accepts, rejects, or – loops forever • a machine recognizes the