haushofer's latest activity
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.Yes. -
haushofer replied to the thread High School Need help understanding particle physics and quantum physics.It's turtles all the way down.
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.I don't understand what that equation says.
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.1) No, not necessarily; look e.g. at the definition of the covariant derivative. A partial derivative is not a tensor under gct's, and...
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.So, to go back to the OP, if this confuses people, they should be careful and distinguish between \delta(g_{\mu\nu}) and (\delta...
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.@anuttarasammyak: By the way, the answer is already given here below. Yes. I guess that one could be pedantic and distinguish between...
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.I don't understand that comment. The validation of the minus-sign is because you consider the variation of the very metric tensor...
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.Do you know any more tensors which include that minus-sign? You just have to be careful if you vary the very object itself which enables...
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.I don't understand this comment or the equation.
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haushofer replied to the thread Graduate Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?.Yes, it's a tensor, as one can easily see by taking the concrete example of the Lie derivative of the metric w.r.t. a vector field...