- #1
camel_jockey
- 38
- 0
Hey everybody!
Physicists have no problem differentiating a function of many variables - in flat space R^n.
But I don't like how many books don't give examples of how this done in a manifold- even if it may be easy when one finally understands it.
For example, how do I differentiate a function f on a circle if that function only lives on the circle and not on an ambient space? For example, if given a prescription of a differentiation (contained in some vector V at a point p), how does V differentiate f explicitly? Can someone explain + give a non-trivial example?
Also, I would very much like to see an example on a sphere too - where many directions may be chosen in which to differentiate a function.
Physicists have no problem differentiating a function of many variables - in flat space R^n.
But I don't like how many books don't give examples of how this done in a manifold- even if it may be easy when one finally understands it.
For example, how do I differentiate a function f on a circle if that function only lives on the circle and not on an ambient space? For example, if given a prescription of a differentiation (contained in some vector V at a point p), how does V differentiate f explicitly? Can someone explain + give a non-trivial example?
Also, I would very much like to see an example on a sphere too - where many directions may be chosen in which to differentiate a function.