I have a 3D function (z = f(x, y)). I have plot it correctly as you can see below. Now, I want to show that there are two different paths to reach from Point A to Point B as shown in the following image.
As you can see, I have done it using Shockwell in Linux. But, I want to do it in a clean manner in Mathematica. How can I plot a path from Point A to B while the path is on the surface?
And, if it is possible, as you can see, my preference is to draw an arrow. But, it is not totally necessary.