Duality in coordinates

Let us introduce some coordinates on .

A generic -dimensional submanifold can be defined by the following equation, depending on an odd parameter and an even parameter :

We conclude that may be coordinatized with and .

Since is a functor, a vector field on should automatically define some vector field on . Theorem 2: The following vector field on :

(2)

defines the following vector field on :

(3)

where is defined as follows:

(4)

Proof: