| Abstract | .... 3 | |
| 1 | Introduction | .... 4 |
| 2 | Basic definitions of tree | .... 6 |
| 3 | Tree automaton and context-free grammar | .... 8 |
| 4 | State characterization matrix | .... 14 |
| 5 | Inductive inference algorithm for context-free grammar | .... 20 |
| 5.1 | Algorithm 1 | .... 20 |
| 5.2 | Interface of parser | .... 22 |
| 6 | Correctness and complexity | .... 22 |
| 7 | An example | .... 27 |
| 8 | More efficient method | .... 32 |
| 9 | Discussions | .... 35 |
| Acknowledgements | .... 37 | |
| References | .... 37 | |
| End | .... 38 |
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