Please demonstrate this expression for me:(adsbygoogle = window.adsbygoogle || []).push({});

For any smooth function f(τ):

f(+[itex]\infty[/itex])+f(-[itex]\infty[/itex])=lim[itex]_{\epsilon\rightarrow0+}[/itex][itex]\epsilon[/itex][itex]\int[/itex][itex]^{+\infty}_{-\infty}[/itex]dτf(τ)exp(-ε/τ/).

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# A question about integral.

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