Consider alphabet Σ = {0,1}. Prove or disprove that for all languages L1, L2, L over Σ, if L₁ CLCL2 and L₁, L₂are decidable, then L is decidable.

Given statement: The statement suggests that when you concatenate two decidable languages, the…

Answered: Consider alphabet Σ = {0,1}. Prove or…

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter17: Markov Chains

Section17.4: Classification Of States In A Markov Chain

Problem 3P

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(For thought) a. A token of a computer language is any sequence of characters, with no intervening characters or white space, that taken as a unit has a unique meaning. Using this definition of a token, determine whether escape sequences, function names, and the keywords listed in Table 2.1 are tokens of the C++ language. b. Discuss whether adding white space to a message alters the message and whether messages can be considered tokens of C++. c. Using the definition of a token in Exercise 4a, determine whether the following statement is true: “Except for tokens of the language, C++ ignores all white space.”

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Consider alphabet Σ = {0,1}. Prove or disprove that for all languages L1, L2, L over Σ, if L₁ CLCL2 and L₁, L₂ are decidable, then L is decidable.