shameless bump
Hi folks,
I am having a hard timne getting my head around a problem involving double integrals, was hoping someone more learned the myself could nudge me in the right direction.
ok, suppose we have,
,
,
Now, define as
Now, in simple terms this is just
Its when I substitute for that i get problems...
I can see that the this extra factor comes from integrating twice.... but i dont understand why it comes about .
Any help would be most appreciated.