3. Using the alphabet Σ = {a, b, let A be the context-free language, A = {w | ww}. That is, A is the language of strings that are not palindromes. Construct a context-free grammar for A. Hint: one approach is to generate characters at the front and the back of the string together, and set up the grammar to force a derivation to include one step where they don't match.
3. Using the alphabet Σ = {a, b, let A be the context-free language, A = {w | ww}. That is, A is the language of strings that are not palindromes. Construct a context-free grammar for A. Hint: one approach is to generate characters at the front and the back of the string together, and set up the grammar to force a derivation to include one step where they don't match.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:3. Using the alphabet Σ = {a, b, let A be the context-free language,
A = {w | ww}.
That is, A is the language of strings that are not palindromes. Construct a context-free grammar
for A. Hint: one approach is to generate characters at the front and the back of the string together,
and set up the grammar to force a derivation to include one step where they don't match.
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