Can anybody help with this:

I have . How to extract u,v as functions from x,y, i.e. to get u(x,y) and v(x,y)?

Results 1 to 10 of 10

- December 16th 2010, 07:27 AM #1

- Joined
- Jan 2010
- Posts
- 53

- December 16th 2010, 11:38 AM #2

- Joined
- Apr 2005
- Posts
- 15,707
- Thanks
- 1470

- December 16th 2010, 11:56 AM #3

- Joined
- Jan 2010
- Posts
- 53

- December 16th 2010, 12:34 PM #4

- Joined
- Dec 2010
- Posts
- 470

- December 16th 2010, 12:42 PM #5

- Joined
- Jan 2010
- Posts
- 53

- December 16th 2010, 12:51 PM #6

- Joined
- Dec 2010
- Posts
- 470

Right, so you don't actually need the explicit formula.

For example, to find and .

Take the partials of the equations directly (independent variables are ):

Note that and .

Solve this system of linear equations at the given point for .

Similar process for other derivatives.

Note you do need to solve for u and v at the point , and you use these values when evaluating things like sin(u).

- December 16th 2010, 02:34 PM #7

- December 17th 2010, 01:37 AM #8

- Joined
- Apr 2005
- Posts
- 15,707
- Thanks
- 1470

- December 17th 2010, 03:54 AM #9

- Joined
- Jan 2010
- Posts
- 53

- December 17th 2010, 05:03 AM #10