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Question 1: A language L is said to be defined if there exists a positive integer k such that, for any string w, the membership of w in L depends solely on the last k symbols of w. (a) Provide a formal definition of this concept. (b) Prove that every defined language is regular. (c) Demonstrate that the class of defined languages is closed under unions and intersections. (d) Give an example of a defined language L such that L* is not defined. (e) Provide examples of defined languages L₁ and L₂ such that the concatenation L₁ L₂ is not defined. Question 1: A language L is said to be defined if there exists a positive integer k such that, for any string w, the membership of w in L depends solely on the last k symbols of w. (a) Provide a formal definition of this concept. (b) Prove that every defined language is regular. (c) Demonstrate that the class of defined languages is closed under unions and intersections. (d) Give an example of a defined language L such that L* is not defined. (e) Provide examples of defined languages L₁ and L₂ such that the concatenation L₁ L₂ is not defined.
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Related Book For
A First Course in Differential Equations with Modeling Applications
ISBN: 978-1111827052
10th edition
Authors: Dennis G. Zill
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