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**George,Y****Member**- Registered: 2006-03-12
- Posts: 1,306

The 2D case of Jocabian determinants is easy:

If you want to express the area of dxdy by dudv, where (x,y) and (u,v) are different coordinate systems and d stands for differentiate.

dxdy= (dx/du dy/dv - dx/dv dy/du) dudv

which makes sense in geometry. The Jocabian Determinant in the parenthesis is in deed the area of dxdy in coordinate (u,v)

But how about n-dimensional case?

Is there a general proof for transformation of coordinates?

**X'(y-Xβ)=0**

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**George,Y****Member**- Registered: 2006-03-12
- Posts: 1,306

I figured it out

Determinant shares the same property with "volume"

x -> ax V->aV

x -> x+y V->V

x,y -> y,x V->-V

So it is reasonable to define a volumn in Rn by its determinant

**X'(y-Xβ)=0**

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**George,Y****Member**- Registered: 2006-03-12
- Posts: 1,306

anyone?

**X'(y-Xβ)=0**

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