Recent content by RestlessRiver

My problem is as follows: "Calculate the determinant of the Kerr metric. Locate the plac where it is infinite. (In fact, this gives the "ring"-singularity och the Kerr black hole, which is the only one) I got the determinant to ...

I have a similar problem and just wondering is Δ=r2+a2-2Mr where a = angular momentum/Mass M =Mass of the black hole r= what radius? radius of the black hole or radius of the "ring" ρ2=r2+a2+cos2θ ?

We got the defenition of the christoffelsymbol Γrsa=½gal(glr,s+gls,r-grs,l) and in flat space gab=(1 0 0 0 || 0 -1 0 0 || 0 0 -1 0 || 0 0 0 -1) and R is Riemann's tensor I'm supposed to calcuate the same thing for 2-space of the cylinder and then determin which is flat and which is...

1.a) Concider the 2-space consisting of a spherical shell at constan radius, r. In polar coordinates the line element on the surface can be written (a, b,∈ 1,2) Homework Equations ds2=gabdxadxb=r2dθ2+sin2θdφ2 calculate gab, Γabc, R1212, R2121, R11, R22, R The Attempt at a Solution...