Chapter 2. Length Spaces 2.1. Length Structures 2.2. First Examples of Length Structures 2.3. Length Structures Induced by Metrics 2.4. Characterization of Intrinsic Metrics 2.5. Shortest Paths 2.6. Length and Hausdorff Measure 2.7. Length and Lipschitz Speed
Chapter 3. Constructions 3.1. Locality, Gluing and Maximal Metrics 3.2. Polyhedral Spaces 3.3. Isometries and Quotients 3.4. Local Isometries and Coverings 3.5. Arcwise Isometries 3.6. Products and Cones
Chapter 4. Spaces of Bounded Curvature 4.1. Definitions 4.2. Examples 4.3. Angles in Alexandrov Spaces and Equivalence of Definitions 4.4. Analysis of Distance Functions 4.5. The First Variation Formula 4.6. Nonzero Curvature Bounds and Globalization 4.7. Curvature of Cones
Chapter 9. Spaces of Curvature Bounded Above 9.1. Definitions and Local Properties 9.2. Hadamard Spaces 9.3. Fundamental Group of a Nonpositively Curved Space 9.4. Example: Semi-dispersing Billiards
Chapter 10. Spaces of Curvature Bounded Below 10.1. One More Definition 10.2. Constructions and Examples 10.3. Toponogov's Theorem 10.4. Curvature and Diameter 10.5. Splitting Theorem 10.6. Dimension and Volume 10.7. Gromov-Hausdorff Limits 10.8. Local Properties 10.9. Spaces of Directions and Tangent Cones 10.10. Further Information Bibliography Index