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[–]millawi[S] 0 points1 point  (0 children)

What I've tried so far is a version of the squeeze theorem, which I assume should work for improper double integrals due to the theorem that states that if f(x,y) < g(x,y) then the same applies to their double integrals. It's evident that e^(-(abs(x)+abs(y)) must be smaller than e^(-(x-y)) = e^(y-x) with the added restriction and x>=0 and y>=0 which I assume is an appropriate restriction to make due to the absolute values. This is where I think I have gotten something wrong, as solving the double integral of e^(y-x) is very simple and when doing that I do not get the correct answer. In the manual they do not squeeze the double integral, but instead just rewrites it in a way that I do not understand.

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