can we use the tools of renormalization of casimir effect to get finite results for any divergent series in QFT?
for example let be the divergent series ∑∞n=1nl for positive 'l' then instead of the sum we interpretate this as the difference
∞∑n=1nle−nϵ−∫∞0dttle−tϵ=finite
this is made to evaluate the infinite sums of the vaccuum energy in casimir effect but could it be done for any divergent series??
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