how can we treat overlapping divergences ? i mean integrals like(adsbygoogle = window.adsbygoogle || []).push({});

[tex] \int_{0}^{\infty} dx \int_{0}^{\infty}dy \frac{1+xy}{x+y+xy+1} [/tex]

my idea is that in this case you can use polar coordinates [tex] x=rcos(u) [/tex] [tex] y=rsin(u) [/tex] , and then if you integrate over the angular variable 'u' then you have a normal divergence [tex] \int_{0}^{\infty} rf(r)dr [/tex] so there is no more overlapping.. but can this be done or you must perform a BHPZ taylor substraction ??

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# Overlapping divergences

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