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Questions about the set of languages (equivalently) described by context-free grammars or accepted by (non-deterministic) pushdown automata.
7
votes
2
answers
2k
views
Generating a set of minimal-length strings that, together, invoke every production of a cont...
Problem (tl;dr)
Given a context free grammar, $G$, find a set of strings that take $G$ through every production it has at least once.
How and how fast can it be done?
Background
I'm working on a …