For an alphabet a string x in * is called a palindrome if x = xR

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For an alphabet ∈ a string x in ∑* is called a palindrome if x = xR - that is, x is equal to its reversal. If A ⊂ ∑* where A = {x ∈ ∑* E*|x = xR}, how can we define the language A recursively?

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Discrete and Combinatorial Mathematics An Applied Introduction

ISBN: 978-0201726343

5th edition

Authors: Ralph P. Grimaldi

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Question Posted: Jun 21, 2016 08:28 AM

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For an alphabet a string x in * is called a palindrome if x = xR

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Discrete and Combinatorial Mathematics An Applied Introduction

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