L2_A
1.Orientation Preserving and Orientation Reversing Map
2. Proposition: The Gauss Map is Orientation Preserving
at Elliptic Point and Orientation Reversing at Hyperbolic
Point
L2_B
1. Proposition: Geometric Interpretation of Gauss Curvature
1. Proposition: Geometric Interpretation of Gauss Curvature
L2_C
1. Proposition: Geometric Interpretation of Gauss Curvature (cont.)
2. Examples: Sphere and Trough-Shaped Surface