## Help with renormalization...

for a divergent series i can write an expression in the form:

$$\int_{R}dxC(x)w(x)e^{-ax}$$

where a is a divegent quantity in the form $$a=ln\epsilon$$

the qeustion is how i would apply renormalization?..in fact if we apply functional differentiation respect to e^{-ax} we get

$$C(x)w(x)$$ the divergent term magically disappears
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