ScalingStacks

Proof. [050A]

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Proof.

We only prove (3.154) because the other equality follows from the same computations. Using the fact that Ωi​j​α​β=−Ωi​j​β​α\Omega_{ij\alpha\beta}=-\Omega_{ij\beta\alpha}, we can write out the left hand side as

Ωi​j​α​β​(12​r​d​yβ​α^−12​r3​yμ​yβ​d​yμ​α^)\displaystyle\Omega_{ij\alpha\beta}(\frac{1}{2r}dy_{\widehat{\beta\alpha}}-\frac{1}{2r^{3}}y_{\mu}y_{\beta}dy_{\widehat{\mu\alpha}})
=\displaystyle= Ωi​j​α,α+1​(−1r​d​yα+2−12​r3​(yα+2​yα+1​d​yyα+1−yα+12​d​yα+2)+12​r3​(yα2​d​yα+2−yα​yα+2​d​yα))\displaystyle\Omega_{ij\alpha,\alpha+1}\Big(-\frac{1}{r}dy_{\alpha+2}-\frac{1}{2r^{3}}(y_{\alpha+2}y_{\alpha+1}dy_{y_{\alpha+1}}-y_{\alpha+1}^{2}dy_{\alpha+2})+\frac{1}{2r^{3}}(y_{\alpha}^{2}dy_{\alpha+2}-y_{\alpha}y_{\alpha+2}dy_{\alpha})\Big)
=\displaystyle= Ωi​j​α,α+1​(−12​r​d​yα+2−12​r2​yα+2​d​r)\displaystyle\Omega_{ij\alpha,\alpha+1}\Big(-\frac{1}{2r}dy_{\alpha+2}-\frac{1}{2r^{2}}y_{\alpha+2}dr\Big)
(3.156) =\displaystyle= −12​Ωi​j​α,β​(12​r​d​yα​β^+12​r2​yα​β^​d​r).\displaystyle-\frac{1}{2}\Omega_{ij\alpha,\beta}\Big(\frac{1}{2r}dy_{\widehat{\alpha\beta}}+\frac{1}{2r^{2}}y_{\widehat{\alpha\beta}}dr\Big).

∎

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