Nested-count context-free grammar
= Nested-count context-free grammar
A context-free grammar can enforce sums such as $0^n1^m0^{n+m}$ by nesting one matched terminal pair for each independent count.
= Nested-count context-free grammar
A context-free grammar can enforce sums such as $0^n1^m0^{n+m}$ by nesting one matched terminal pair for each independent count.