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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 …
Patrick Collins's user avatar