Recent content by vitaniarain

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    Eddington Finkelstein coordinates in the Schwarzschild spacetime

    Thank you for your answers and help!
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    Eddington Finkelstein coordinates in the Schwarzschild spacetime

    Do the Eddington-Finkelstein coordinates allow to cover the maximal analytic extension of the Schwarzschild spacetime? ans if not what region do they cover?
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    Covariant derivate same as normal derivative?

    thanks for the reply. f is a scalar field. what do u mean what kind of covariant derivative i didn't know there were many. this is in the framework of general relativity..
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    Covariant derivate same as normal derivative?

    hey, I'm getting really confused with something. If i have the covariant derivative of say, constant * exp(2f), is this equivalent to 2*constant*exp(2f) * cov.deriv. of f ?
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    Covariant derivative of the metric

    if u act on a kronecker delta with the covariant deriv will that give zero? :S
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    Covariant derivative of the metric

    hello! just a quick question, does the covariant derivative of the metric give zero even when the indices(one of the indices) of the metric are(is) raised? also another question not entirely related, does the covariant deriv. of exp(2 phi) where phi is the field, also give zero or not...
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    Calculating the area of a sphere

    So is it 4 pi M or 16 pi M. Because if the area is 4*pi*r^2 and r = 2M it should be 16*pi*M right?
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    Calculating the area of a sphere

    How do you calculate the area of a sphere? for example in schwarzschild geometry and considering only the three dimensional spatial metric, what would be the area (and how do u calculate it) of a sphere of radius 2M?
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