Recent content by Sphinx

Is Hamilton-Jacobi Equation equivalent to Hamilton equations or it is only a necessary condition ? Thanks in advance :)

Thanks a lot , this is very instructive

thanks a lot for the explanation

Hello folks! why a formula of type K/r^2 for the gravitationnal interaction is incompatible with the principle of special relativity ? ( the electric field is also defined with the same kind of relations)

I didn't see how to use the div theo, but know it's clear. Thank u very much Orodruin & ChrisVer

∫ƒ.ds over a closed surface =∫div(f) dΩ over the corresponding volume =∫div(f) dΩ over a sphere enclosing the volume =∫ƒ.ds over the surface of the sphere is that correct??

Yes, but this is the last step of the proof , my difficulty resides in proving that the integral doesn't depend on the closed surface

Hello everyone! I have a question concerning the proof of Poisson's equation for a gravitational field. My question is how can i prove that Gauss's Law is independent of the choice of the closed surface surrounding the point mass? Thanks in advance