## Admissibility of Logical Inference RulesThe aim of this book is to present the fundamental theoretical results concerning inference rules in deductive formal systems. Primary attention is focused on: • • the derivability of the admissible inference rules • the structural completeness of logics • the bases for admissible and valid inference rules. There is particular emphasis on propositional non-standard logics (primary, superintuitionistic and modal logics) but general logical consequence relations and classical first-order theories are also considered. The book is basically self-contained and special attention has been made to present the material in a convenient manner for the reader. Proofs of results, many of which are not readily available elsewhere, are also included. The book is written at a level appropriate for first-year graduate students in mathematics or computer science. Although some knowledge of elementary logic and universal algebra are necessary, the first chapter includes all the results from universal algebra and logic that the reader needs. For graduate students in mathematics and computer science the book is an excellent textbook. |

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### Contents

3 | |

8 | |

17 | |

Chapter 2 Semantics for NonStandard Logics | 103 |

Chapter 3 Criteria for Admissibility | 279 |

Chapter 4 Bases for Inference Rules | 393 |

Chapter 5 Structural Completeness | 475 |

Chapter 6 Related Questions | 525 |

595 | |

603 | |