12.1 Curves in
12.2 Regular Surfaces in
12.3 Induced Euclidean Derivative in
12.4 Covariant Derivative on Regular Surfaces in
12.5 Covariant Derivative on Curves in
12.6 Lie Bracket in
12.7 Orientation in
12.8 Gauss Curvature in
12.9 Riemann Curvature Tensor in
12.10 Computations for Regular Surfaces in