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Let Ωand Ω'be subsets of R2. Use the results of Exercise 59 to prove that if a transformation T:Ω→Ω'is invertible, and if both T and T-1are differentiable, then role="math" ∂(x,y)∂(u,v)∂(u,v)∂(x,y)=1.

Short Answer

Expert verified

It is proved that∂(x,y)∂(u,v)∂(u,v)∂(x,y)=1.

Step by step solution

01

Given information

Consider a chain of functions is defined as,

x=x(u,v);y=y(u,v)u=u(s,t);v=v(s,t)

The chain rule of Jacobian is defined as,

role="math" ∂(x,y)∂(u,v)∂(u,v)∂(s,t)=∂(x,y)∂(s,t)

02

Proof

Consider a transformation T:(x,y)→(u,v)andT-1:(u,v)→(x,y).

Use the above-given definition of the chain rule of Jacobians to derive the relation.

∂(x,y)∂(u,v)∂(u,v)∂(x,y)=∂(x,y)∂(x,y)=1

Hence, proved.

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