As others have pointed out, yes, absolutely they did. If you get that the 'interval' or 'proper time' (the time as measured by the observer taking the route) between two events in space-time is like distance between two points (via different routes) in Euclidean space, then you're half way...
I'm working through Ray d'Inverno's book "Introducing Einstein's Relativity" and I've got to the section that introduces Penrose diagrams. The first example is just Minkowski space-time. The construction goes from Schwarzschild coordinates ##t## and ##r##, to define null coordinates ##v = t +...
Thanks!
Yes - but it didn't seem to preview properly (or even at all) when I was writing the original message, seems to be working now I'm writing a reply.
$$\Omega^{-2} = \frac{1}{4} \sec^2 p \sec^2 q$$
Thanks anyway.
High all, I'm originally an engineer (degree in electronics but now software) and I'm studying physics for pleasure. Done a few Open University (UK) modules to get me up to some sort of speed mathematically, and got a distinction in their quantum mechanics course :smile: . Unfortunately their...