julian's latest activity
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Jjulian reacted to TSny's post in the thread A Error in Landau-Lifshitz Vol 2, equation (2), page 277 with
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In the 4th edition (1975), the relevant page is 257, not 277. I believe I was able to derive the equation for ##D_{\alpha}## in (2) by... -
Jjulian replied to the thread A Error in Landau-Lifshitz Vol 2, equation (2), page 277.I think this is the fourth edition: https://archive.org/details/landau-l.-d.-lifshitz-e.-m.-course-of-theoretical-vol-2/page/n3/mode/2up
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Jjulian reacted to phinds's post in the thread I Physicists disagree wildly on what quantum mechanics says about real… with Like.
I thought it would be informative to post the full chart from the article:
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Jjulian reacted to gasgas's post in the thread A Uncertainties in the proof of Proposition 4.4.2 in Hawking and Ellis with Like.
Thank you so much, I will study these notes further.
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Jjulian replied to the thread A Uncertainties in the proof of Proposition 4.4.2 in Hawking and Ellis.I believe these notes cover Proposition 4.4.2 - in the author's notes it appears as Proposition 4.3.7. I spoke with the author about his...
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Jjulian replied to the thread Independent components of three indexed systems ##T_{ijk}##.The "stars and bars" thing: Consider the example where ##T_{ijk}## is symmetric under the interchange of any pair of indices, and the...
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Jjulian replied to the thread Independent components of three indexed systems ##T_{ijk}##.Say ##i=1,2,\cdots n##, and consider the object ##T_{i_i i_2 \cdots i_k}## that is symmetric under the interchange of any pair of...
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Jjulian replied to the thread Independent components of three indexed systems ##T_{ijk}##.The approach is thorough, though perhaps a bit more detailed than necessary. (1) This symmetry applies to ##i## and ##j##. For each...
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Jjulian replied to the thread Solve the first order linear differential equation.Just to clarify — the expression you gave for the integrating factor wasn’t correct, so I was pointing that out.
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Jjulian replied to the thread Solve the first order linear differential equation.It should be ##\int \ln x dx = x \ln x -x +C##, so ##e^{\int \ln x dx} = K x^x e^{-x}##.
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Jjulian replied to the thread Inverse Mellin transform of the Gamma function.Alternatively, following the suggestion made by @Paul Colby. Note, \begin{align*}...