Regular tree grammars are a formalism used to define and generate infinite trees, similar to how regular grammars define and generate strings in formal language theory. While traditional regular grammars focus on sequences of symbols (strings), regular tree grammars focus on tree structures, which are hierarchical rather than linear. ### Key Concepts of Regular Tree Grammars 1. **Trees**: A tree consists of nodes connected by edges, where one node is designated as the root.
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