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东方天遥

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[求助] 求助！！！Gravitation 題目！！！

????У????]???????Bel-Robinson, ???x?????

$T_{\alpha\beta\gamma\delta}=R_{\alpha\rho\gamma\sigma}{R_\beta^{\phantom{\beta}\rho{}}_\delta^{\phantom{\delta}\sigma}+*R_{\alpha\rho\gamma\sigma}*{R_\beta^{\phantom{\beta}\rho{}}_\delta^{\phantom{\delta}\sigma}$

??????Hodge star??????C?????@???????????????????????

$T_{\alpha\beta\gamma\delta}=R_{\alpha\rho\gamma\sigma}{R_\beta^{\phantom{\beta}\rho{}}_\delta^{\phantom{\delta}\sigma}+R_{\alpha\rho\delta\sigma}{R_\beta^{\phantom{\beta}\rho}}_\gamma^{\phantom{\gamma}\sigma}-\frac{1}{8}g_{\alpha\beta}g_{\gamma\delta}R_{\rho\sigma\lambda\mu}R^{\rho\sigma\lambda\mu}$ .

??F??????C???????е???????

$*R_{\alpha\rho\gamma\sigma}*{R_\beta^{\phantom{\beta}\rho{}}_\delta^{\phantom{\delta}\sigma}=R_{\alpha\rho\delta\sigma}{R_\beta^{\phantom{\beta}\rho}}_\gamma^{\phantom{\gamma}\sigma}-\frac{1}{2}g_{\gamma\delta}R_{\alpha\rho\mu\nu}R_\beta^{\phantom{\beta}\rho\mu\nu}$ ??

????????C????????????????c?????x??

[ Last edited by ??????? on 2012-8-1 at 21:17 ]

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