| Abstract | .... 2 | |
| 1 | Introduction | .... 3 |
| 2 | Monotonic Knowledge and Nonmonotonic Belief | .... 4 |
| 3 | Minimal Belief Revision | .... 5 |
| 3.1 | Proof Theory | .... 5 |
| 3.2 | Model Theory | .... 6 |
| 4 | Examples | .... 7 |
| 5 | Related Research | .... 10 |
| 5.1 | Formalisms of Nonmonotonic Reasoning | .... 10 |
| 5.2 | Truth Maintenance System | .... 11 |
| 5.3 | Database Updates | .... 11 |
| 6 | Conclusion | .... 11 |
| Acknowledgment | .... 11 | |
| Appendix | Proof of Propositions | .... 11 |
| References | .... 15 |
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