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Joined 2026-09-21 Message
Incoming links: Context-free grammar for even palindromes
Past exam of the mathematics course of the University of Cambridge 2019 ii Paper 1 4H b i Solution Created 2026-09-24 Updated 2026-10-03
This language is context-free. It is the language of even-length palindromes over , generated by the context-free grammarEvery derivation adds matching outer symbols, and removing the matching first and last symbols gives the converse induction.