| Preface |
| I. Motivation |
| I.1 The Three-Dimensional Affine Space as Prototype of Linear Manifolds |
| I.2 The Real Projective Plane as Prototype of the Lattice of Subspaces of a Linear Manifold |
| II. The Basic Properties of a Linear Manifold |
| II.1 Dedekind's Law and the Principle of Complementation |
| II.2 Linear Dependence and Independence; Rank |
| II.3 The Adjoint Space |
| Appendix I. Application to Systems of Linear Homogeneous Equations |
| Appendix II. Paired Spaces |
| II.4 The Adjunct Space |
| Appendix III. Fano's Postulate |
| III. Projectivities |
| III.1 Representation of Projectivities by Semi-linear Transformations |
| Appendix I. Projective Construction of the Homothetic Group |
| III.2 The Group of Collineations |
| III.3 The Second Fundamental Theorem of Projective Geometry |
| Appendix II. The Theorem of Pappus |
| III.4 The Projective Geometry of a Line in Space; Cross Ratios |
| Appendix III. Projective Ordering of a Space |
| IV. Dualities |
| IV.1 Existence of Dualities; Semi-bilinear Forms |
| IV.2 Null Systems |
| IV.3 Representation of Polarities |
| IV.4 Isotropic and Non-isotropic Subspaces of a Polarity; Index and Nullity |
| Appendix I. Sylvester's Theorem of Inertia |
| Appendix II. Projective Relations between Lines Induced by Polarities |
| Appendix III. The Theorem of Pascal |
| IV.5 The Group of a Polarity |
| Appendix IV. The Polarities with Transitive Group |
| IV.6 The Non-isotropic Subspaces of a Polarity |
| V. The Ring of a Linear Manifold |
| V.1 Definition of the Endomorphism Ring |
| V.2 The Three Cornered Galois Theory |
| V.3 The Finitely Generated Ideals |
| V.4 The Isomorphisms of the Endomorphism Ring |
| V.5 The Anti-isomorphisms of the Endomorphism Ring |
| Appendix I. The Two-sided Ideals of the Endomorphism Ring |
| VI. The Groups of a Linear Manifold |
| VI.1 The Center of the Full Linear Group |
| VI.2 First and Second Centralizer of an Involution |
| VI.3 Transformations of Class 2 |
| VI.4 Cosets of Involutions |
| VI.5 The Isomorphisms of the Full Linear Group |
| Appendix I. Groups of Involutions |
| VI.6 Characterization of the Full Linear Group within the Group of Semi-linear Transformations |
| VI.7 The Isomorphisms of the Group of Semi-linear Transformations |
| VII. Internal Characterization of the System of Subspaces |
| A Short Bibliography of the Principles of Geometry |
| VII.1 Basic Concepts, Postulates and Elementary Properties |
| VII.2 Dependent and Independent Points |
| VII.3 The Theorem of Desargues |
| VII.4 The Imbedding Theorem |
| VII.5 The Group of a Hyperplane |
| VII.6 The Representation Th |
| VII.7 The Principles of Affine Geometry |
| Appendix S. A Survey of the Basic Concepts and Principles of the Theory of Sets |
| A Selection of Suitable Introductions into the Theory of Sets |
| Sets and Subsets |
| Mappings |
| Partially Ordered Sets |
| Well Ordering |
| Ordinal Numbers |
| Cardinal Numbers |
| Bibliography |
| Index |