Recent content by FunWarrior

Hi everybody, Around a black hole, a test particle can experience two types precession: of its pericenter and of its angular momentum vector. I would like to know if there exist an EXACT expression for the rate at which these two precession occurs both for a Schwarzschild and a Kerr black hole...

Hi Halaaku, What is important to understand here is that ea and eb are vectors, not numbers. Therefore, (ea-gafef).eb = 0 only means that ea-gafef and eb are two orthogonal vectors (because the dot between them is a scalar product, not a multiplication). So the result can not be shownin this...

Good morning. I would like to prove that the integral h^{\mu \nu} (\vec{r},t) = \int d \zeta \int d^3 \vec{y} \frac{F^{\mu \nu} (\zeta,\tilde{\tau}) \delta^{(3)} (\vec{r} - \vec{x}(\zeta,\tilde{\tau}))}{|\vec{r}-\vec{y}|} where \tilde{\tau} = t - |\vec{r}-\vec{y}|, is equal to \int...

Hi, I am trying to create two coils with different axes on Comsol Multiphysics 3.5. I use the 2D axisymetric mode but it allows to create only coils with the same axe. Can somebody help me ? Thanks in advance.