I’m Aronno, an undergraduate in theoretical physics. Most of what I think about is gravity, black holes, the geometry of spacetime and how well observations actually pin down general relativity. This blog is where I work those things out in public 🙂¶
Posts come in a few kinds. Expository posts are full derivations written so that you could rebuild the result yourself without having seen it before. Notes are shorter and rougher, closer to what I’d write down while learning something. Research posts are about my own work and Diary posts are everything else.¶
If you’re new I’d start with From the Equivalence Principle to Curved Geometry of Spacetime, Why $R_{\mu\nu}=0$ does not imply $R_{\mu\nu\rho\sigma}=0$ and The Eddington Luminosity in Spherical Accretion and Beyond. If you’d rather begin with the mathematics, So what are tensors, really? and Deriving the Euler–Lagrange Equation for Particles, Fields, and Curved Spacetime build the tools the other posts lean on. Everything is also sorted by subject on the Topics page.¶
You can follow along through the RSS feed or on Mathstodon. Comments are open on every post and $\LaTeX$ works in them, so if you find a wrong sign or a gap in an argument, please say so there.¶