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Elementary Differential Geometry: Lecture Notes Gilbert Weinstein Contents Preface 5 Chapter 1. Curves 7 1. Preliminaries 7 2. Local Theory for Curves in R3 8 3. Plane Curves 10 4. Fenchel’s Theorem 15 Exercises 16 Chapter 2. Local Surface Theory 19 1. Surfaces 19 2. The First Fundamental Form 21 3. The Second Fundamental Form 23 4. Examples 25 5. Lines of Curvature 28 6. More Examples 30 7. Surface Area 33 8. Bernstein’s Theorem 37 9. Theorema Egregium 39 Exercises 41 Chapter 3. Local Intrinsic Geometry of Surfaces 45 1. Riemannian Surfaces 45 2. Lie Derivative 47 3. Covariant Differentiation 48 4. Geodesics 50 5. The Riemann Curvature Tensor 53 6. The Second Variation of Arclength 56 Exercises 59 Chapter 4. Global Theory of Surfaces 61 1. Differentiable Manifolds 61 2. Some Multi-linear Algebra 64 3. Integration 65 Exercises 65 Index 67 3
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