ScalingStacks

Proof. [045U]

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Proof.

To evaluate these integrals, we introduce a radial variable

s=ap​q¯​(sp+−1​yp)​(s−−1​yq),s=a_{p\bar{q}}(s_{p}+\sqrt{-1}y_{p})(s-\sqrt{-1}y_{q}),

and then elementary calculations in polar coordinates give

I01=π𝔸​∫A𝔸​|y|a2∞1s​(s+A​μ2)3/2​ds,\begin{split}I_{01}=\frac{\pi}{\sqrt{\mathbb{A}}}\int_{\frac{A}{\mathbb{A}}|y|_{a}^{2}}^{\infty}\frac{1}{s(s+A\mu^{2})^{3/2}}ds,\end{split}

and similarly

I02=π𝔸​∫A𝔸​|y|a2∞1s2​(s+A​μ2)1/2​ds=−12​I01+π​𝔸A​ϱ​|y|a2,\begin{split}I_{02}=\frac{\pi}{\sqrt{\mathbb{A}}}\int_{\frac{A}{\mathbb{A}}|y|_{a}^{2}}^{\infty}\frac{1}{s^{2}(s+A\mu^{2})^{1/2}}ds=-\frac{1}{2}I_{01}+\frac{\pi\sqrt{\mathbb{A}}}{A\varrho|y|_{a}^{2}},\end{split}

together with the formula for I03I_{03}. The formulae for Ip​3I_{p3} and Ip​4I_{p4} follow from taking linear combinations. ∎

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