do invariants in general relativity exist? i mean quantity J so [tex]\frac{dJ}{dt}=0[/tex]...(adsbygoogle = window.adsbygoogle || []).push({});

another question let suppose we take the Lie gorup of [tex]g_ab,\pi_ab[/tex] being g_ab and Pi_ab the metric and momentum density could we obtain the Casimir invariant of this group?....

the last question given the lagrangian of special relativity [tex]{g^1/2}Rdx^4[/tex] how do you calculate the momentum [tex]\pi_ab[/tex] ?...

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# Invariants in general relativity

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