On the synchronized derivation depth of context-free grammars
We consider depth of derivations as a complexity measure for synchronized and ordinary context-free grammars. This measure differs from the earlier considered synchronization depth in that it counts the depth of the entire derivation tree. We consider (non-)existence of trade-offs when using synchronized grammars as opposed to non-synchronized grammars and establish lower bounds for certain classes of linear context-free languages. (C) 2009 Elsevier B.V. All rights reserved.
synchronization context-free languages regulated rewriting derivation complexity