Question: Let u = x 2 + y 2 , v = x y , x = s + t , y = s - t

Let u=x2+y2,v=xy,x=s+t,y=s-t. Compute the Jacobian
del(u,v)del(s,t)=det([us',ut'],[vs',vt'])
using the chain rule. Check the answer with a direct computation.
Let u = x 2 + y 2 , v = x y , x = s + t , y = s -

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