## Non-Euclidean Geometry: A Critical and Historical Study of Its DevelopmentThis is an excellent historical and mathematical view by a renowned Italian geometer of the geometries that have risen from a rejection of Euclid's parallel postulate. Students, teachers and mathematicians will find here a ready reference source and guide to a field that has now become overwhelmingly important. |

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### Contents

pages | 1 |

Chapter IL | 18 |

Chapter | 64 |

Chapter IV | 84 |

Chapter V | 128 |

Appendix L | 180 |

Appendix IL | 196 |

Appendix | 216 |

Appendix IV | 227 |

Appendix V | 238 |

Index of Authors | 265 |

Introduction 129 | iii |

250 | xviii |