I like reading older papers. It allows me to develop a feel for the motivation of the current results and helps to introduce the culture of an area. But more that this, reading older papers sometimes provides insights which are taken for granted in modern textbooks and are assumed knowledge in modern papers. Finding that …
Category Archive: Academia
Taking another look at gravitational fields at infinity
I’ve now read lots more about spinors and vector bundles and am feeling far more confident about understanding exactly what Friedrich is up to. I’m aiming to provide a post on each major section (and sometimes subsection) to both help me and maybe you (assuming anyone reads this!). So the introduction. It makes a lot …
Blogging from an iPad
So now I have an iPad and I’ve managed to post this from the word press app. Good for me right? Well maybe, I’m currently trying to integrate it into my academic life more thoroughly, but I seem to constantly come across interesting problems. For example, while there are great, free, note taking software none …
Is general relativity “essential understood”?
Predictably the papers answer is no. Why? Because current numerical methods in general relativity are limited. The paper implies that these limitations are Inability to compute global solutions Inability to evolve initial data for strongly gravitating and very dynamic systems. In any case Friedrich then divides the field equations to four classes the system of …
Numerical treatment of the hyperboloidal initial value problem for the vacuum Einstein equations. I. The conformal field equations.
It a long title for a small paper that provides a decent overview. I’ll be honest, I’m struggling to get a grip on the PDE side of GR. Oh I don’t have much of a problem with the notation, the concepts, or the methods. What I do have a problem with is the motivation. I …