Differential on Manifolds的用法和样例：
- partial differential operator on manifold
- Differential equation on manifold
- Prove that if is differentiable on (a , b), then is continuous on (a , b).
- The Laplacian on Riemannian manifolds is an essential linear operator, and it is also the main object to be studied of Geometric Analysis on manifolds.
- In mathematics, Riemannian centroid is characterized by an optimization problem on manifolds, which is very difficult but has received extensive attentions.