General Relativity by David Tong
= General Relativity by David Tong
{c}
{tag=Work by David Tong}
{title2=2019}
https://www.damtp.cam.ac.uk/user/tong/gr/gr.pdf
The lecture notes by <David Tong> derive <Friedmann equations> in section 4.6.2 and classify <Reissner-Nordstrom spacetime> in sections 6.2.1–6.2.5. Section 6.2 distinguishes the central <curvature singularity> from regular horizons, including the extremal limit.