trying to evaluate the double integral from 0 to infinity and 0 to infinity of [(x^2 + y^2)/1 + (x^2-y^2)^2]e^-2xy dxdy
using the coordinate transformation u=x^2-y^2 and v=2xy
The Attempt at a Solution
so i calculated the jacobian which looks nice 4(x^2+y^2)..can see some canceling there
just can't see what the new limits will be...
thanks for any help